新生儿期生长迅速,热量需要相对较大,此期以奶类喂养为主,液体入量相对较多。未成熟儿吸吮及吞咽功能差或伴有某种疾病,单纯口服时常处于饥饿状态。新生儿对脂肪消化能力差,尤以未成熟儿食用全脂奶时可排出食入脂肪的10～20％(正常排出10％以下)。新生儿由于消化道功能成熟较差,胃肠道括约肌及肠道运动协调不良常表现腹胀、吞气症、肉眼大 Neonatal rapid growth, calorie needs relatively large, this period to the main feeding of milk, liquid intake is relatively large. Unripe children sucking and swallowing dysfunction or associated with a disease, often purely oral in starvation. Neonatal poor digestion of fat, especially when immature children eat whole milk can be fed into the fat 10 to 20% (normal discharge of less than 10%). Neonates due to poor digestive tract function, gastrointestinal sphincter and intestinal dysfunction often show bloating, swallowing disease, the naked eye