患者，男，21岁，因反复发热7d而入院。患者体温为39～40℃，无明显规律性，无畏寒，伴纳差、乏力和全身大关节疼痛．无咳嗽、头痛和呕吐。在当地卫生院住院治疗无效而入院．体查：体温40℃，脉搏88次，呼吸20次，血压13／8kPa，神清。右颈部可如及数粒花生米大的淋巴结，质硬 Patient, male, 21 years old, admitted to hospital for repeated fever 7d. Patients with body temperature 39 ~ 40 ℃, no obvious regularity, no chills, with poor appetite, fatigue and generalized joint pain. No cough, headache and vomiting. Inpatient treatment in the local hospital invalid and admitted. Physical examination: body temperature 40 ℃, pulse 88 times, breathing 20 times, blood pressure 13 / 8kPa, Shen Qing. The right neck can be as large as the number of peanuts and lymph nodes, hard