A week is a bit impossible, but a month or two is possible. One month: eat bananas for breakfast, but drink a glass of milk or eat an egg before eating bananas. Bananas should not be eaten on an empty stomach. Lunch, a little lean meat, must be thin, not fat. Don't eat too much, eat vegetables. Dinner, half an apple. After 2 1, don't eat, don't eat midnight snack. You can't eat any sweets except apples and bananas. And exercise. Girls have inconvenient days. So I made two exercise plans for you. General situation: jog 800 meters in the morning and 800 meters in the afternoon. Take a walk for an hour after supper. Or sing. Special circumstances: stand for 30 minutes after meals and walk 1 hour. Jogging for 400 meters. Remember, it must be slow. Too strenuous exercise can't be reduced. Note: It is best to eat fish when eating meat, which is not only good for the skin, but also won't gain weight. (steamed soup and boiled water)

If you really want to lose weight quickly, you can choose to eat apples and yogurt. Don't eat dinner, eat apples at noon. You can't exercise, or you will be more hungry. I don't recommend the method of adding yogurt to apples. You can lose weight quickly, but it is easy to rebound and unhealthy. I hope I can help you. I 12 years old, very fat. I really lost weight by using the first method. I weigh about 65 Jin now.