目的：探讨小气道病变常见病因及对因治疗的意义。
Objective: To observe the usual cause of small airway disease and the significance of etiological therapy.
目的探讨呼气末定量CT对早期小气道病变的诊断价值。
Objective to determine whether the end expiratory quantitative ct has value in detecting early stage small airway diseases.
目的探讨呼气末定量CT对早期小气道病变的诊断价值。
Objective to determine whether the end expiratory quantitative ct has value in detecting early stage small airway diseases.
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