單項選擇題患者,女,34歲。面色萎黃,經(jīng)期錯后,行經(jīng)腹痛,痛處固定,遇溫痛減。用藥宜首選()

A.當歸
B.熟地黃
C.何首烏
D.白芍
E.阿膠