对话理解。

A: Excuse me. 80___________________________? I want to post a letter.

B: 81__________________________? There are two post offices in our town.

A: I want to go to the nearer one. 82_________________________.

B: Walk there? OK. Walk along this street and turn right at the second crossing. It is between the

    bookstore and the bank. I am sure you can't miss it.

A: Oh, I see. By the way, 83________________________?

B: Only five minutes' walk.

A: Thanks a lot.

B: 84_____________________.

女，30岁，闭经，溢乳一年，CT检查技术采用（）

A．头颅轴位平扫 

B．头颅冠状位平扫 

C．蝶鞍失状位增强扫描 

D．蝶鞍冠状位薄层增强扫描 

E．蝶鞍失状位薄层增强扫描