The reason _______ he explained for his being late was ________ his alarm clock didn’t work.

A．why; because

B．that; because

C．/; that

D．for which; that

治疗营卫失调汗证的首选方剂为( )

A．桂枝汤

B．黄芪桂枝五物汤

C．牡蛎散

D．当归六黄汤

E．生脉散