术期并发血栓形成的机制包括() ["A．血液凝固性增高","B．血液粘度增加","C．血流减慢","D．血管内溶血","E．血管壁的损伤和破坏"]
血小板的生理止血作用机制是促进了()血液流出血管后由流动的溶胶状态变为不流动的凝胶状态称为()血液中加入枸橼酸钠可防止()血小板释放的儿茶酚胺可使() ["A．血液凝固","B．血管收缩","C．两者均有","D．两者均无"]
与羊水栓塞无关的致病因素是() ["A．前置胎盘","B．宫缩过强","C．中期妊娠引产","D．胎盘早剥","E．宫缩乏力"]
甲状腺手术中误切除甲状旁腺时()维生素D代谢障碍时()甲状旁腺过度增生时() ["A．血磷升高","B．血钙降低","C．两者均有","D．两者均无"]
下列哪项因素与软产道裂伤无关() ["A．会阴、阴道扩张不充分","B．产程延长","C．急产","D．经产妇","E．胎儿前肩娩出时"]
凝血酶原、纤维蛋白原()凝血酶原、因子Ⅶ、Ⅸ、Ⅹ()易变因子()组织因子、因子Ⅷ()
