— Will you stay for lunch?

— Sorry, _____. My sister is coming to see me. [ ]

A. I mustn't

B. I needn't

C. I can't

D. I won't

吴茱萸在温经汤中的作用是（）

A.温胃暖肝

B.温中补虚

C.和胃降逆

D.散寒止痛

E.暖脾温胃