— I drove to Zhuhai for the air show last week.

— Is that ____________ you had a few days off?

A．why

B．when

C．what

D．where

25岁初产妇，足月顺产，产后第2天，T37．5℃， * * 流血少，宫底脐下一指，收缩好。可诊断为（）

A.子宫复旧不良

B.产后子宫内膜炎

C.胎盘胎膜部分残留

D.上呼吸道感染

E.正常产褥