A three-month-old artificially fed baby eats 5 times a day, with a total volume of about 750-800ml. He does not like to breastfeed for nearly half a month. Each feeding takes a long time and the total volume is reduced. He is in good spirits and has normal stools. The urine is yellow. Asked whether this will affect the development, the doctor recommended feeding on demand, and introduced the newborn’s gastric capacity and gastric emptying time, as well as the feeding method for babies under four months.