单项选择题

A.同时合并静脉注射肝素及口服warfarin
B.使用低分子量肝素(Low-molecular-weight heparin)
C.静脉注射单一剂量5000U非分化肝素(unfractionated heparin)
D.静脉注射80U/kg非分化肝素(unfractionated heparin),然后18U/kg/hour持续静脉滴注