A.30-50cm,20-30min B.30-50cm,30-60min C.50-60cm,20-30min D.50-60cm,30-60min
A.痔疮手术后 B.肛门部充血 C.外阴部炎症 D.妊娠末期
A.在鼻腔内滴麻黄素 B.头部放低 C.用冰囊置于鼻根部 D.鼻部填塞止血