精选优质文档-倾情为你奉上第二篇：Going on a diet A typical person needs about l ,800 calories per day to stay alive. These calories keep your heart beating and your lungs breathing. They keep your organs operating properly and your brain running. They also keep your body warm. A person increases weight because he or she consumes more calories per day than needed. The only way to lose fat is to reduce the number of calories that you consume per day. This is the basic principle behind going on a diet
