單項(xiàng)選擇題便血紫暗,甚則黑色,腹部隱痛,喜熱飲,面色不華,神疲懶言,便溏,舌質(zhì)淡,脈細(xì),其選方是()

A.槐角丸
B.黃土湯
C.歸脾湯
D.六君子湯
E.補(bǔ)中益氣湯