下列不属于项目建设准备阶段的回顾与评价内容的是（）。

A.工程勘察设计

B.采购招投标

C.重大设计变更

D.开工准备

The book, which is a useful guide for today''s young people, deals with many questions and problems that face them at school and at home as well as in society.

A．are faced

B．confront

C．in opposition

D．meet