Diet: You don't need to go on a diet occasionally, you just need to control the intake of staple food for dinner, eat as little staple food as possible, and eat less greasy and light food at the same time.
Work and rest: no requirements. Be sure to fall asleep before 1 1 at night.
Exercise: You may not have much time for exercise, but you can walk with your mother around 8 pm every day, arrange climbing or swimming once a week, or jog for 30 minutes around 7 am. The principle is to exercise as much as possible to promote metabolism.
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