1　本病例特点①男性 ,4 9岁 ,工人。既往有长期大量吸烟史及饮酒史。糖尿病史多年 ,血糖控制欠佳 ;②咳嗽、咳痰伴左下胸痛 2 0余天 ,为少量白色粘液痰 ,无咯血 ,病初无发热 ,后渐出现以夜间为明显的高热 ,抗生素治疗无效。胸痛局限于左下胸部 ,与呼吸有关。体重短期内明显下 1 The characteristics of this case ① male, 49 years old, workers. Past long history of heavy smoking and drinking history. History of diabetes for many years, poor blood glucose control; ② cough, sputum with left lower chest pain more than 20 days, a small amount of white mucus sputum, no hemoptysis, no fever early in the disease, gradually appeared at night was significantly higher fever, antibiotic treatment ineffective. Chest pain limited to the lower left chest, and breathing. Weight shortly noticeable