羊水栓塞的临床表现不包括() ["产妇呛咳,呼吸困难","产妇心率快,脉搏弱,血压降低","多脏器功能衰竭","阴道出血不止,血液不凝","腹痛剧烈,腹部呈板状"]
患者男,20岁,机器砸伤致左手流血、活动受限,大拇指离断2h入院,急诊检查发现:手背肿胀明显,大拇指离断,左手掌侧可见一长约7cm的伤口,伤口活动性出血,深达皮下,环指、小指掌指关节呈屈曲位。离断指体的保存方式是() ["A.置于冰盐水中","置于消毒碘伏中","置于常温生理盐水中","用干燥敷料包裹即可","用湿敷料包裹,置于放置冰袋的低温冷藏箱中保存","用敷料包裹,置于生理盐水中保存"]
糖尿病酮症酸中毒时尿液的气味通常是()。 ["鼠臭味","大蒜味","氨味","烂苹果味","汽油味"]
妊娠期胆囊生理的改变不包括() ["血液及胆汁内胆固醇浓度增加","胆道平滑肌松弛","胆囊运动能力减弱","胆汁成分没有改变","胆汁淤积易导致结石"]
早期诊断双胎妊娠最可靠的依据() ["B型超声检查","多普勒胎儿仪检查","β-hCG","尿E3值","L/S比值"]
简述水体富营养化现象及其防治措施。