患儿，男，324天，因发热一天，呼吸困难半天，于1994年11月8日13时50分人院。系第一胎足月顺产，APgar评分10’，体重3．okg，入院前一天发热39℃，口吐白沫，哭声低，吃奶少。在乡医院给予青霉素纳40万单位肌肉注射，一日两次；当日上午情况好，T37．SC，呼吸平，两肺呼吸音 Children, male, 324 days, due to fever a day, difficulty breathing for half a day, at 8:54 on November 8, 1994 were hospitalized. The first full-term fetus was delivered on a monthly basis, APgar score 10 ’, body weight 3. okg, the day before admission, fever 39 ℃, foaming at the mouth, cry low, eat less milk. In the township hospital penicillin 400,000 units intramuscular injection, twice a day; the same morning good condition, T37. SC, breathing flat, breath sounds of both lungs