根据下面对话中的情景，在每个空白处填人适当的语句，使对话恢复完整。

A: You look tired. __1___

B: I am not feeling well. I have a toothahe.

A: _   2    _

B: Yesterday morning.

A: _    3      Did you go to see the dentist?

B:      4       The doctor gave me some medicine.

A: I hope      5      

B: Thank you.

佝偻病活动期患儿采用维生素D突击疗法治疗后多久需改为预防量

A．1个月
B．2个月
C．3个月
D．4个月
E．5个月