單項選擇題患者,女,27歲。妊娠兩月余,不慎跌跤,小腹刺痛,陰部滲紅,用藥應(yīng)首選的藥物是()

A.杜仲
B.續(xù)斷
C.桑寄生
D.艾葉
E.白術(shù)