The user wants a full article in Chinese, with title already fixed. They want the content without the title, directly output the article body. Must be 1500+ characters, 6-8 paragraphs, each 150-250 characters (words? they said 150-250字, which means characters). Must be at least 1050 characters, but they also require 1500+字. So we need about 1500 Chinese characters, split into 6-8 paragraphs, each 150-250 characters. Let's aim for 7 paragraphs of ~215 characters each, totaling about 1505 characters. Must not include title. Must be natural, conversational, avoid AI phrases. Must not use banned words like "、". Must not use intro filler like "". Must start each paragraph directly. Must end each paragraph with a lingering point or natural transition, not a summary ending. Must avoid concluding summarizing phrases. Must avoid ending with "让我们...", "。标题里提到的“无缝切换”，正是我们最关心的核心目标。通过本文，我们把迁移全流程拆解成可落地的步骤，帮助你在不影响业务的前提下完成服务器切换。" Count characters? Let's approximate: Chinese characters count each char. Let's count roughly: "在实际项目中，Oracle数据库服务器迁移往往是一次技术与业务双重考验。" That's about 30. Continue: "标题里提到的“无缝切换”，正是我们最关心的核心目标。" ~30. "通过本文，我们把迁移全流程拆解成可落地的步骤，帮助你在不影响业务的前提下完成服务器切换。" ~45. Total maybe 105. Need 150-250. Add more: "如果你曾为迁移过程中的停机窗口焦虑，或是担心数据一致性，这篇攻略会给出答案。" That adds ~30. So total maybe 135. Need a bit more: "下面的内容，我们从准备阶段一直聊到上线验证，手把手展示每个关键环节的细节。" Add ~30. So total ~165. Good.
Paragraph 2: talk about assessment and inventory. Must be 150-250 characters, end with lingering point.
Paragraph 3: environment prep.
Paragraph 4: data migration methods.
Paragraph 5: testing and validation.
Paragraph 6: cutover execution.
Paragraph 7: post-migration and final thought.
Make sure each paragraph ends not with a summarizing phrase but with something that leaves a point or transition.
Let's craft paragraphs.
I'll write them and then approximate character count.
Paragraph 1 (approx 170 chars). Let's write:
"在实际项目中，Oracle数据库服务器迁移往往是一次技术与业务双重考验。标题里提到的“无缝切换”，正是我们最关心的核心目标。通过本文，我们把迁移全流程拆解成可落地的步骤，帮助你在不影响业务的前提下完成服务器切换。如果你曾为迁移过程中的停机窗口焦虑，或是担心数据一致性，这篇攻略会给出答案。下面的内容，我们从准备阶段一直聊到上线验证，手把手展示每个关键环节的细节。"
Now count characters: Let's count quickly (including punctuation). I'll count characters manually? Let's approximate: Chinese characters count each. I'll count words:
在(1) 实(2) 际(3) 项(4) 目(5) 中(6)，O(7) r(8) a(9) c(10) l(11) e(12) 数(13) 据(14) 库(15) 服(16) 务(17) 务(18) 器(19) 迁(20) 移(21) 往(22) 样(23) 是(24) 一(25) 次(26) 技(27) 术(28) 与(29) 业(30) 务(31) 双(32) 重(33) 考(34) 验(35)。标(36) 题(37) 里(38) 提(39) 到(40) 的(41) “(maybe not count) but we can approximate. This is tedious. Let's trust it's around 170-180 characters. Should be okay.
Paragraph 2: "迁移前的调研决定成败。你需要把现有环境的版本、参数、磁盘布局、网络配置以及业务依赖梳理清楚。把所有数据库实例、表空间、用户权限列成表格，形成迁移清单。评估数据量大小，预估传输时长和恢复窗口，确保业务方的容忍度足够。这一步如果漏项，后续会出现隐藏风险，导致切换时被动反应。" Need to avoid "", "". Must not use those transition words. So cannot use "", "". Must rewrite without them. Use direct sentences.
Rewrite: "迁移前的调研决定成败。你需要把现有环境的版本、参数、磁盘布局、网络配置以及业务依赖梳理清楚。把所有数据库实例、表空间、用户权限列成表格，形成迁移清单。评估数据量大小，预估传输时长和恢复窗口，确保业务方的容忍度足够。漏项会让后续出现隐藏风险，导致切换时被动反应。" This ends with "导致切换时被动反应。" That's okay, not a summarizing phrase. It's okay.
Paragraph 3: talk about environment prep. Avoid "". Use direct.
Paragraph 3 draft: "硬件与网络是迁移的基石。新服务器必须满足和旧机器相同或更高的CPU、内存、存储IOPS需求。操作系统要选对发行版，并打好补丁，确保与Oracle兼容。网络层面，建议使用专用通道或VPN，保证传输带宽和延迟在可接受范围。与此同时，提前在目标机器上安装相同的Oracle版本、创建同名的操作系统用户，并配置好防火墙规则。完成这些准备后，迁移才能顺利进入数据搬运阶段。"
Check for banned words: No "". Good.
Paragraph 4: talk about data migration methods.
Paragraph 4 draft: "迁移数据有多种路径，最常用的两种是全量导出导入和传输表空间。expdp/impdp适合数据量不大、对版本差异敏感的情况，但恢复时间较长。而Transportable Tablespace只要拷贝数据文件并同步日志，就能实现近乎零停机的切换。如果数据库支持增量复制，还可以结合GoldenGate实时同步，做到最终一致性。选择哪种方案，要结合业务窗口和数据量特性来判断。"
Check for banned words: No "". Good.
Paragraph 5: talk about testing and validation.
Paragraph 5 draft: "在正式切换之前，必须在目标环境完成完整的功能验证。先跑一次完整的数据导入，检查表、索引、约束是否完整。随后执行业务关键查询，比对结果与源库是否一致。性能基准测试同样重要，观察CPU、IO和内存使用情况是否在预期范围。如果发现异常，及时回滚并排查根因，确保上线时不会出现性能瓶颈。" No banned words.
Paragraph 6: talk about cutover execution.
Paragraph 6 draft: "切换当天的关键在于精准的时机控制和实时监控。先把业务流量切到只读模式，停止写入，完成一次日志同步。随后启动业务切换脚本，将连接字符串切向新服务器。整个过程最好准备回
