题目:
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:
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