---I have cleaned the room three times a day. Look, It is a mess again.

---       ! Wait until the children go to bed.

A．How come

B．Why bother

C．So what

D．What for

小儿易患五迟、五软、解颅、遗尿等病，原因主要是（）。

A．肺脏娇嫩 

B.脾常不足

C.肾常虚

D.稚阴稚阳

E.纯阳之体