男,61岁。因咳嗽、咳痰1月余收住入院。患者1个月前无明显诱因出现咳嗽、咯痰(痰液呈少许黄色)伴发热,体温38.1℃。半个月前自行口服抗感染药物(具体不详)治疗,咳嗽、咳痰无明显好转。既往无特殊病史。体质量无明显下降。查体:生命体征平稳。双肺呼吸音粗糙,未闻及干湿啰音。查血白细胞9.87×109/L,中性粒细胞7.78×109/L,中性粒细胞 Male, 61 years old. Due to cough, sputum admitted more than 1 month admission. Patient 1 month ago no obvious incentive to cough, expectoration (sputum was a little yellow) with fever, body temperature 38.1 ℃. Half a month ago, oral anti-infective drugs (specifically unknown) treatment, cough, sputum no significant improvement. No special medical history. No significant decline in body mass. Physical examination: vital signs stable. Breathe sound rough lungs, no smell and wet and dry rales. Check white blood cells 9.87 × 109 / L, neutrophils 7.78 × 109 / L, neutrophils