患儿,男,3岁。面色苍白10月余,发热、咳嗽4天入院。患儿于3个月前曾因便血、腹痛拟诊为“急性出血性小肠炎”,经激素、抗生素、止血剂及输血等治疗半月,好转出院。但贫血症状无明显改善,于20天前入某医院进一步检查,外周血象示全血减少,骨髓象提示感染,巨核细胞生成减少。肝、肾功 Children, male, 3 years old. Pale white October, fever, cough 4 days admission. Children with blood in the stool 3 months ago, abdominal pain to be diagnosed as “acute hemorrhagic enteritis,” hormones, antibiotics, hemostatic agents and blood transfusions and other treatment for half a month, improved discharged. However, no significant improvement in symptoms of anemia, 20 days ago into a hospital for further examination, peripheral blood showed reduced whole blood, bone marrow like infection, decreased megakaryocytopoiesis. Liver, kidney function