问题
单项选择题
重度哮喘发作的常见原因包括（）①致敏原或其他致喘因素持续存往②呼吸道感染未能控制；因脱水、痰液黏稠，阻塞气道；③糖皮质激素依赖型哮喘病人突然停用激素或减量速度过快；④对β-受体激动剂“失敏”或气道反应性反跳性增高；
A.①②③
B.①③
C.②④
D.④
E.①②③④
答案
参考答案：E
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重度哮喘发作的常见原因包括（）①致敏原或其他致喘因素持续存往②呼吸道感染未能控制；因脱水、痰液黏稠，阻塞气道；③糖皮质激素依赖型哮喘病人突然停用激素或减量速度过快；④对β-受体激动剂“失敏”或气道反应性反跳性增高；
A.①②③
B.①③
C.②④
D.④
E.①②③④
参考答案：E
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