如果你是以信的形式寫的檢討書那就應該有

如果你的標題是檢討書那就不用寫

建議兩種格式

1、 檢討書

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x年x月x日

xxx

2、親愛的（xxx）或直接寫人名

Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

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此致

敬禮

x年x月x日

xxx