患者男，19岁。因头晕、乏力、心悸2个月．晕厥1次入院。入院前2个月开始出现头晕、乏力、活动心悸、气促，有时伴发热，曾解黑便1次，5小时前晕厥而入院。查体：重度贫血貌，皮肤粘膜苍白，无黄疽，皮下无出血，双侧腹股沟触及花生仁大小淋巴结，胸骨无压痛，两肺无罗音，心尖 Male patient, 19 years old. Due to dizziness, fatigue, palpitations 2 months. Syndrome 1 admission. Two months before admission, he developed dizziness, fatigue, heart palpitations, shortness of breath, and sometimes fever. He had black stools once and syncope 5 hours before admission. Physical examination: Severe anemic appearance, pale skin and mucous membranes, no jaundice, no bleeding under the skin, bilateral groin touching the size of peanuts, no tenderness of the sternum, no rales in both lungs, apex of the heart