患者,男,29岁,因反复低热半月余于4月20日入院,无咳嗽咳痰,无进行性消瘦。入院后体温37.5℃,脉搏78次/min,呼吸23次/min,血压116/85mmHg。查体:发育正常,五官正常,咽峡充血,扁桃体无肿大,两肺呼吸音粗,心律齐,心率72次/min,未闻及杂音。余体征均为阴性。入院时实验室检查:外周 Patient, male, 29 years old, admitted to hospital on April 20 due to repeated low-grade fever more than half a month, without cough and expectoration, without progressive weight loss. After admission, body temperature 37.5 ℃, pulse 78 beats / min, breathing 23 beats / min, blood pressure 116 / 85mmHg. Physical examination: normal development, facial features normal, angina congestion, tonsil no swelling, coarse breath sounds of both lungs, heart rate Qi, heart rate 72 beats / min, no smell and noise. I signs were negative. Laboratory examination on admission: Peripheral