Abstract：
A 3-year-old had spontaneous gingival hemorrhage and bilateral limb weakness with inability to bear weight. He had no preceding oral trauma or recent infection, took no regular medications, and had no recent use of aspirin or nonsteroidal anti-inflammatory drugs; his diet was limited to primarily chicken nuggets and milk. What is the diagnosis and what would you do next?
摘要：
3岁的孩子有自发性牙龈出血和双侧肢体无力，无法承受体重。他之前没有口腔外伤或最近感染，没有服用常规药物，并且最近没有使用阿司匹林或非甾体类抗炎药;他的饮食主要限于鸡块和牛奶。诊断是什么，你下一步会做什么？
