患儿,女性,80天,因出生后一周起黑便,进行性贫血住院。患儿系第2胎第2产,足月急产,生在泥土地上约半小时后接生,生下情况好,无窒息抢救史,出生体重3公斤.母乳喂养。于生后一周排黑色大便每天2～5次,量不等,未见明显鲜血样便,无脐、鼻、皮肤等处出血现象,体温正常, Children, women, 80 days, due to blackmail from the week after birth, hospitalized for anemia. The second line of children with the second production, full-term acute birth, born in the mud on the ground about half an hour after delivery, gave birth to good condition, no asphyxia rescue history, birth weight 3 kg. Breastfeeding. In the week after birth row black stool 2 to 5 times a day, ranging from quantity, no obvious blood-like stool, no bleeding at the umbilical, nasal, skin, body temperature is normal,