翻译下列段落 To keep healthy weight, it is important to have the right amount of calories for your age. The calorie is the measure of how much energy food gives us. Doctor King says boys and girls need different amounts of calories. Girls between 12—15 should have 1,800 calories a day and boys around 2,000. She also says that corn, vegetables and fruits are good choices for daily meals instead of foods like hamburgers and ice-cream.