单项选择题 A 68=year-old man,with chronic cough and sputum production for 17 years,had felt a progressive dyspnea slnce 3 years. His chest X-ray film showed overinflation of lungs and descended diaphragms. The peripheral vasculature of the lungs was diminished. Which dis-ease the patient suffered from most possibly（）

单项选择题 患者，男，40岁，4年来，每年冬季咳嗽，咳少量白痰或伴喘息，每年发病3个月余，无发热、盗汗等症状，无粉尘接触史，患者最可能有以下哪种表现（）

单项选择题 患者，男，54岁，自10年前始气候转冷时出现咳嗽、咳痰或伴喘息，每年发病3个月，无发热、盗汗等症状，无粉尘接触史。X线检查：两肺纹理粗乱及可见网状、斑片状、条索状阴影。最可能的诊断是（）