糖尿病酮症酸中毒时，早期过多补碱的主要危害是（） ["低血钠","低血钾","低血磷","脑水肿","代谢性碱中毒"]
某患者行走不稳（夜晚黑暗时加重），行走时双目注视地面，跨步大，举足高，踏步作响，应考虑为（） ["小脑性共济失调","前庭功能障碍","感觉性共济失调","下肢痉挛性轻瘫"]
咳大量脓性痰见于（） ["支气管扩张","支原体肺炎","充血性心力衰竭","慢性支气管炎","细支气管肺泡癌"]
简述尿液标本的收集方式。
雷诺现象的皮肤颜色变化顺序为（）. ["红→白→紫","紫→红→白","紫→白→红","红→紫→自","白→紫→红"]
心绞痛治疗原则
