In the office I never seem to have time until after 5: 30 pm,_____ many people have gone home.  [ ]

A. that                          

B. which  

C. whose time                    

D. by which time

治疗经行小腹冷痛，得热痛减，按之痛甚，经量少，经色黯黑，应首选（）

A.膈下逐瘀汤

B.温经汤

C.清热调血汤

D.圣愈汤

E.少腹逐瘀汤