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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <title>文艺复兴</title>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <title>卖掉了我的内存</title>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <pubDate>Mon, 21 Sep 2026 00:00:00 GMT</pubDate>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <title>标题五个字</title>
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      <pubDate>Tue, 11 Aug 2026 00:00:00 GMT</pubDate>
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      <title>公主连结六星开花纪念册</title>
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      <pubDate>Thu, 06 Aug 2026 00:00:00 GMT</pubDate>
      <description>我要成为超级无敌PCR大王</description>
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      <title>洗手池里那只螃蟹</title>
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      <pubDate>Mon, 23 Mar 2026 00:00:00 GMT</pubDate>
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    <item>
      <title>寺里的乌龟池</title>
      <link>https://clannad.top/journal/life/temple-turtle-pond</link>
      <guid>https://clannad.top/journal/life/temple-turtle-pond</guid>
      <pubDate>Sat, 21 Feb 2026 00:00:00 GMT</pubDate>
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      <title>佰味龙自助餐烤肉火锅</title>
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      <pubDate>Mon, 02 Feb 2026 00:00:00 GMT</pubDate>
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    <item>
      <title>正宗萨莉亚</title>
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      <pubDate>Sat, 20 Dec 2025 00:00:00 GMT</pubDate>
      <description>这才是No.1啊！</description>
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    <item>
      <title>楼下那家让我破防的烧烤</title>
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      <pubDate>Wed, 17 Dec 2025 00:00:00 GMT</pubDate>
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      <title>我要成为超级无敌darker大王</title>
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      <pubDate>Sun, 07 Dec 2025 00:00:00 GMT</pubDate>
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      <title>一抽屉荷氏，和将要到来的长夜</title>
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      <pubDate>Tue, 25 Nov 2025 00:00:00 GMT</pubDate>
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    <item>
      <title>为了赶五点的火车，我在健身房过了一夜</title>
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      <pubDate>Thu, 09 Oct 2025 00:00:00 GMT</pubDate>
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    <item>
      <title>一整袋芝士加进去饭团里面会怎么样？</title>
      <link>https://clannad.top/journal/life/cheese-rice-ball-on-campus</link>
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      <pubDate>Tue, 30 Sep 2025 00:00:00 GMT</pubDate>
      <description></description>
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      <title>MySQL 使用 C 语言连接：mysql C API 增删改查实战</title>
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      <pubDate>Mon, 28 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL C API：环境与头文件/库连接、mysql_init/connect/query、查询与取结果 MYSQL_RES、增删改查完整 C 程序、字符集设置与错误处理。</description>
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      <title>MySQL 用户管理：用户、权限、字符集与数据库备份</title>
      <link>https://clannad.top/engineering/mysql/mysql-user-management</link>
      <guid>https://clannad.top/engineering/mysql/mysql-user-management</guid>
      <pubDate>Sun, 27 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 用户与权限管理：创建/删除用户、host 与访问控制、GRANT 授权与 REVOKE 回收、权限级别、刷新权限，以及字符集配置与常见备份运维。</description>
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    <item>
      <title>MySQL 视图特性：虚拟表、查询封装与权限控制</title>
      <link>https://clannad.top/engineering/mysql/mysql-view</link>
      <guid>https://clannad.top/engineering/mysql/mysql-view</guid>
      <pubDate>Sat, 26 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 视图：视图概念、创建 CREATE VIEW、查看/修改/删除、视图与基表的联动、为什么用视图（简化/安全/一致性）、可更新视图的限制与系统视图。</description>
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      <title>MySQL 事务管理：ACID、隔离级别与 MVCC 原理</title>
      <link>https://clannad.top/engineering/mysql/mysql-transaction</link>
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      <pubDate>Fri, 25 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 事务：事务是什么、ACID 四大特性、事务的使用、并发带来的一致性问题（脏读/不可重复读/幻读）、隔离级别与锁、undo log 与 MVCC 实现。</description>
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    <item>
      <title>MySQL 索引特性：B+ 树索引、主键/唯一/联合索引与使用</title>
      <link>https://clannad.top/engineering/mysql/mysql-index</link>
      <guid>https://clannad.top/engineering/mysql/mysql-index</guid>
      <pubDate>Thu, 24 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 索引：为什么需要、B+ 树索引结构、主键/唯一/普通/联合/全文索引、创建删除、最左前缀、索引失效与覆盖索引，通过 EXPLAIN 看执行计划。</description>
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    <item>
      <title>MySQL 内外连接：INNER/LEFT/RIGHT JOIN 与连接思维</title>
      <link>https://clannad.top/engineering/mysql/mysql-inner-outer-join</link>
      <guid>https://clannad.top/engineering/mysql/mysql-inner-outer-join</guid>
      <pubDate>Wed, 23 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 连接：内连接 INNER JOIN、左/右外连接、自连接、ON 过滤条件与保留行、连接口决与常见坑，多表综合练习。</description>
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    <item>
      <title>MySQL 复合查询：多表查询、子查询与合并查询</title>
      <link>https://clannad.top/engineering/mysql/mysql-composite-query</link>
      <guid>https://clannad.top/engineering/mysql/mysql-composite-query</guid>
      <pubDate>Tue, 22 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 复合查询：多表查（笛卡尔积/连接）、子查询（单行/多行/多列/EXISTS/IN）、合并查询 UNION，配合多张表的完整练手。</description>
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    <item>
      <title>MySQL 内置函数：日期、字符串、数字与流程控制函数</title>
      <link>https://clannad.top/engineering/mysql/mysql-builtin-functions</link>
      <guid>https://clannad.top/engineering/mysql/mysql-builtin-functions</guid>
      <pubDate>Mon, 21 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 内置函数：日期时间函数、字符串函数、数学函数、聚合函数、加密/JSON，以及 IF/CASE 流程控制，每个都给出示例与易错点。</description>
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    <item>
      <title>MySQL 基本查询：SELECT、WHERE、聚合、分组与排序</title>
      <link>https://clannad.top/engineering/mysql/mysql-basic-query</link>
      <guid>https://clannad.top/engineering/mysql/mysql-basic-query</guid>
      <pubDate>Sun, 20 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 基本查询：SELECT 列选择与别名、WHERE 条件、DISTINCT、聚合函数、GROUP BY/HAAVING、ORDER BY/LIMIT、模糊与区间查询，逐条的 SQL 执行与结果示例。</description>
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    <item>
      <title>MySQL 表的约束：主键、唯一、非空、默认、自增与外键</title>
      <link>https://clannad.top/engineering/mysql/mysql-constraints</link>
      <guid>https://clannad.top/engineering/mysql/mysql-constraints</guid>
      <pubDate>Sat, 19 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 约束：约束的意义、NULL 特性、主键 PRIMARY KEY（含复合主键）、唯一、非空、默认、自增 AUTO_INCREMENT、外键与对照表，常见约束报错与设计原则。</description>
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    <item>
      <title>MySQL 数据类型：数值、字符、日期与选择原则</title>
      <link>https://clannad.top/engineering/mysql/mysql-data-types</link>
      <guid>https://clannad.top/engineering/mysql/mysql-data-types</guid>
      <pubDate>Fri, 18 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 数据类型：整数（TINYINT…BIGINT）、浮点与 DECIMAL、字符串 CHAR/VARCHAR/TEXT/BLOB、日期时间、枚举 SET，选型原则与溢出符号坑。</description>
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    <item>
      <title>MySQL 表的操作：建表、约束、修改与删除</title>
      <link>https://clannad.top/engineering/mysql/mysql-table-ops</link>
      <guid>https://clannad.top/engineering/mysql/mysql-table-ops</guid>
      <pubDate>Thu, 17 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 表操作：数据类型选用、建表语法、约束（主键/非空/默认/唯一/检查）、ALTER 增删字段、DROP 表、查看表结构，建表规范与坑。</description>
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    <item>
      <title>MySQL 库的操作：创建、查看、删改与备份恢复</title>
      <link>https://clannad.top/engineering/mysql/mysql-library-ops</link>
      <guid>https://clannad.top/engineering/mysql/mysql-library-ops</guid>
      <pubDate>Wed, 16 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 库操作：CREATE/DROP 数据库、字符集与排序规则的指定、SHOW 查看、ALTER 修改、备份 mysqldump 与恢复，库操作规范与注意事项。</description>
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      <title>MySQL 数据库基础：认识库、表、SQL 与使用方式</title>
      <link>https://clannad.top/engineering/mysql/mysql-basics</link>
      <guid>https://clannad.top/engineering/mysql/mysql-basics</guid>
      <pubDate>Tue, 15 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 基础：什么是数据库/数据库管理系统、关系型与非关系、库与表的概念、SQL 的 DDL/DML/DQL/DCL 分类、连接与使用 MySQL 的方式。</description>
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    <item>
      <title>MySQL 在 CentOS 7 环境的安装：yum 源、启动与基础配置</title>
      <link>https://clannad.top/engineering/mysql/mysql-install</link>
      <guid>https://clannad.top/engineering/mysql/mysql-install</guid>
      <pubDate>Mon, 14 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 MySQL 在 CentOS 7 安装：环境准备、官方 yum 源、yum install、启动/初始化、root 密码、远程访问与用户配置、常见安装报错排查。</description>
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    <item>
      <title>笔试强训第 08 周：逐题精讲与完整题解</title>
      <link>https://clannad.top/engineering/exam/exam-week-08</link>
      <guid>https://clannad.top/engineering/exam/exam-week-08</guid>
      <pubDate>Sun, 13 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第08周：每道题给出题干、思路、完整可编译代码、真实运行结果与详解答案；可用本地编译器验证后再写入。</description>
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      <title>笔试强训第 07 周：逐题精讲与完整题解</title>
      <link>https://clannad.top/engineering/exam/exam-week-07</link>
      <guid>https://clannad.top/engineering/exam/exam-week-07</guid>
      <pubDate>Sat, 12 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第07周：每道题给出题干、思路、完整可编译代码、真实运行结果与详解答案；可用本地编译器验证后再写入。</description>
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      <title>笔试强训第 06 周：逐题精讲与完整题解</title>
      <link>https://clannad.top/engineering/exam/exam-week-06</link>
      <guid>https://clannad.top/engineering/exam/exam-week-06</guid>
      <pubDate>Fri, 11 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第06周：每道题给出题干、思路、完整可编译代码、真实运行结果与详解答案；可用本地编译器验证后再写入。</description>
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    <item>
      <title>笔试强训第 05 周：逐题精讲与完整题解</title>
      <link>https://clannad.top/engineering/exam/exam-week-05</link>
      <guid>https://clannad.top/engineering/exam/exam-week-05</guid>
      <pubDate>Thu, 10 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第05周：每道题给出题干、思路、完整可编译代码、真实运行结果与详解答案；可用本地编译器验证后再写入。</description>
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    <item>
      <title>笔试强训第 04 周：逐题精讲与完整题解</title>
      <link>https://clannad.top/engineering/exam/exam-week-04</link>
      <guid>https://clannad.top/engineering/exam/exam-week-04</guid>
      <pubDate>Wed, 09 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第04周：每道题给出题干、思路、完整可编译代码、真实运行结果与详解答案；可用本地编译器验证后再写入。</description>
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    <item>
      <title>笔试强训第 03 周：选择题精讲与编程题一题多解</title>
      <link>https://clannad.top/engineering/exam/exam-week-03</link>
      <guid>https://clannad.top/engineering/exam/exam-week-03</guid>
      <pubDate>Tue, 08 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第03周全解析：逐题讲解选择题（含答案解析）、编程题给出思路+多解代码+复杂度分析+运行验证。</description>
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    <item>
      <title>笔试强训第 02 周：选择题精讲与编程题一题多解</title>
      <link>https://clannad.top/engineering/exam/exam-week-02</link>
      <guid>https://clannad.top/engineering/exam/exam-week-02</guid>
      <pubDate>Mon, 07 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第02周全解析：逐题讲解选择题（含答案解析）、编程题给出思路+多解代码+复杂度分析+运行验证，帮助查漏补缺。</description>
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    <item>
      <title>笔试强训第 01 周：选择题精讲与编程题一题多解</title>
      <link>https://clannad.top/engineering/exam/exam-week-01</link>
      <guid>https://clannad.top/engineering/exam/exam-week-01</guid>
      <pubDate>Sun, 06 Jul 2025 00:00:00 GMT</pubDate>
      <description>笔试强训第01周全解析：逐题讲解选择题（含答案解析）、编程题给出思路+多解代码+复杂度分析+运行验证，帮助查漏补缺。</description>
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      <title>跳表 Skiplist：随机化多级索引与概率平衡的数据结构</title>
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      <pubDate>Sat, 05 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入跳表：为什么需要、多层链表思想与查找 O(log n)、随机层数与概率、节点结构与头/尾哨兵、查找/插入/删除的完整实现、复杂度与 Redis ZSet 的应用。</description>
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      <title>LRU Cache：哈希表 + 双向链表实现 O(1) 的最近最少使用缓存</title>
      <link>https://clannad.top/engineering/data-structures/cpp-ds-lru-cache</link>
      <guid>https://clannad.top/engineering/data-structures/cpp-ds-lru-cache</guid>
      <pubDate>Fri, 04 Jul 2025 00:00:00 GMT</pubDate>
      <description>深入 LRU 缓存：为什么需要、设计要点、哈希表+双向链表的 O(1) get/put 实现、手写 list+umap 与自写双向链表两版、容量淘汰与边界，附带力扣 146 的完整题解。</description>
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