If parents have children help with housework, the children will feel needed.        , they will learn to take care of themselves.

A．On the contrary

B．In a word

C．That is to say

D．What^’s more

为治乳汁不下及热痹之良药的是（）。

A.通草

B.木通

C.茯苓

D.石韦

E.海金沙