简述低钙血症的临床表现和治疗。
少尿或无尿的休克病人禁用的药物是 ["A．山莨菪碱","B．去甲肾上腺素","C．异丙肾上腺素","D．阿托品","E．多巴胺"]
多巴胺舒张肾血管的机制是 ["A．兴奋D1受体","B．阻断α1受体","C．兴奋α2受体","D．兴奋β2受体","E．阻断β1受体"]
简述低渗性缺水的临床表现和治疗。
抢救溺水、麻醉意外引起的心脏停搏，最好选用 ["A．地高辛","B．间羟胺","C．去甲肾上腺素","D．多巴胺","E．肾上腺素"]
简述高渗性缺水的临床表现和治疗。
