It has been announced that all the candidates______ remain in their seats until all the papers have been collected.

A．can

B．will

C．shall

D．should

患者，女，28岁，已婚，月经周期正常，经期6天，近半年来，每月于月经后7天左右见 * * 少量出血，色红，质黏腻，持续2～4天自止伴胸闷烦躁，神疲乏力，食欲不佳，舌苔白腻，脉滑

此病最常用方剂为（）

A.两地汤合二至丸

B.逐瘀止血汤

C.清肝止淋加减

D.人参养荣汤

E.丹栀逍遥散