患儿男,9个月,因多饮、多尿,消瘦3个月,恶心、呕吐半个月入院。患儿生后6个月曾感冒发热,3天后体温恢复正常。此后发现患儿食欲减退,多饮(每日纯饮水1250ml),多尿(每日20余次),无尿痛,且渐消瘦,夜间易惊。近半个月出现恶心呕吐,无发热及咳嗽,有时便秘。患儿系第1胎,足月顺产,家 Children male, 9 months, due to drink more, polyuria, weight loss 3 months, nausea, vomiting, admitted to hospital for half a month. Children with fever and flu 6 months after birth, body temperature returned to normal after 3 days. Since then found that children with loss of appetite, drink more (daily pure water 1250ml), polyuria (more than 20 times daily), no dysuria, and gradually thinner, easy to panic at night. Nearly half a month nausea and vomiting, fever and cough, and sometimes constipation. Children in the first child, full-term natural delivery, home