Food should be diversified, not picky eaters, and the intake of vegetables and fruits should be guaranteed every day, and fruits should not be used instead of vegetables, nor should vegetables be used instead of fruits. The daily intake of oil should conform to China's dietary table. Don't wait until you are thirsty to drink water, and don't drink too much water, otherwise it will be harmful to your health. Generally, the principle of homogeneous substitution is adopted. Be sure to ensure the intake of oil, and don't eat greasy food just because you want to lose weight. Because oil is a synthetic substance of certain hormones. In addition, we should pay attention to the contradiction between things.