患儿，男，2个半月，自生后3天起反复腹泻，咳嗽，发端8天入院。系第3胎第3产，足月顺产，生后一般情况好，母乳喂养。生后3天开始腹泻，1月后腹泻明显加重，为黄色稀区，伴发热、恶心、呕吐，体重不增，按肠炎治疗，曾2次查血销、血氯均低，住院23天好转出院。7～8天前又开始 Children, male, 2 and a half months, three days after birth from the repeated diarrhea, cough, hair 8 days admission. Department of the third birth of the third line, full-term birth, after birth, the general situation is good, breastfeeding. 3 days after birth, diarrhea, diarrhea significantly increased in January after the yellow area, with fever, nausea, vomiting, weight gain, according to enteritis treatment, had 2 times the blood test, blood chlorine were low, hospital 23 days improved Discharged. 7 to 8 days ago began again