Report - CH20 · 2018. 6. 29. · 118 2. 空氣汙染：香菸煙霧、汽車廢氣、空氣汙染等會使呼吸道分泌物增加，支氣管黏液腺增大， 黏膜水腫，導致痰液不易咳出，易演變成慢性咳嗽。

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