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【单选题】
患者男性,28岁,因外出春游出现咳嗽.咳白粘痰伴喘息1天入院,体检:体湿36.5°C,脉搏90次/分,呼吸28次/分,血压120/80mmHg,在肺部可闻及广泛哮鸣音,既往有哮喘史。该病人哮喘发作最可能的诱因是
A.
花粉
B.
尘螨
C.
动物的屑
D.
病毒感染
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