For my older child, I made the formula according to the directions on the label, adding X spoons of the powder to Y cc's of formula. She was fed in a very standardized way. For my second child, there was no set number of hours between feedings. When she'd get hungry and start crying, I'd feed her.
老大我是照著奶粉罐上的說明，多少西西的開水加進幾匙奶粉，絕對標準化地餵養；老二餵母奶，就不能固定幾個小時餵一次，她餓了哭了就得給她吃，吃飽了，她就睡覺，強迫她再多吃一口都不可能。