临床上应用血管扩张药的基本指征为（）

A.肺动脉高压，使右向左分流加大

B.心室充盈且心脏每搏量减少

C.周围血管阻力升高且心脏每搏量减少

D.充血性心力衰竭

E.主动脉瓣替换术后心功能不全

Don’t rest on your laurels;（）your success and start looking for new markets now.

A. add up

B. follow up

C. work up

D. count up