患者，男，55岁，患胆结石3余年。近日因过食油腻之品，突发右胁痛，恶心呕吐，口苦，小黄黄赤，大便干，舌红，苔黄腻，脉弦数，B超示胆囊炎伴胆结石。

治法为 （）

A.疏肝和胃，行气止痛

B.疏肝解郁，行气止痛

C.健脾和胃，理气止痛

D.清利肝胆，通降排石

E.降逆和胃，和络止痛

As many as five courses are provided, and you are free to choose ________ suits you best.

A．whichever

B．whatever

C．whenever

D．wherever