The manager listened to the customers’ complaints attentively with great patience, _______ to miss any point.

A．not trying

B．trying not

C．to try not

D．not to try

四神丸中“姜枣同煮，枣肉为丸”的用意是（）

A.调和营卫

B.温补脾胃

C.补中养血

D.调和诸药

E.温中止泻