心下有痰饮，胸胁支满，目眩者，宜用（）。

A.肾气丸

B.苓桂术甘汤

C.小半夏加茯苓汤

D.小青龙汤

E.泽泻汤

In order to do something meaningful, it’s necessary that you _______ determine what is really important.

A．must

B．will

C．need

D．should