Mr Black must be worried about something. You can ____ it from the look on his face.

A．reason

B．recognize

C．read

D．realize

肾虚头痛兼外感寒邪，侵犯少阴经脉，可用：（）

A.麻黄汤

B.大补元煎

C.川芎茶调散

D.麻黄附子细辛汤

E.以上都不是