單項選擇題妊娠期間,腰酸腹痛,小腹空墜,陰道少量出血,色淡質(zhì)稀,精神倦怠,氣短懶言,中醫(yī)辨證為:()

A.腎虛
B.血虛
C.血熱
D.氣虛
E.氣郁