根据短文内容，从下框A-F选项中选出能概括每段主题的最佳选项，并在答题卡上将该选项涂黑。选项中有一项为多余项。（E="AB; " F=AC）

A．Why exercise? B．Healthy eating C．A picture of being healthy D．Exercise tips E．The importance of being healthy F．A healthy combination

 
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You use energy for everything you do．That energy comes from the food you eat．Too much food or too little exercise causes your body to store the extra energy in fat cells．Lighten up on the food or increase your exercise and you might drop a few pounds．But if you exercise regularly and eat a healthy diet, you'll feel more healthy and strong as well as look great．
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You probably have an image in your mind of what the "perfect" or "ideal" body looks like．Try not to press yourself to look that way．Each person is born with genes that control the shape of his /her body．Everyone is different．It is important to be comfortable with the body you have．"Healthy" and "ideal" are not always the same．Healthy eating habits and regular exercise are the best ways to look and feel your personal best．
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Exercise does more than just burn calories．For instance, regular exercise makes your muscles strong and flexible, and increases the amount of muscle you have; makes your heart stronger and lowers your blood pressure; makes you feels more energetic, even when you're not exercising and improves your mood and makes you feel better about yourself．
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Always warm up and stretch for 5--10 minutes before you do strength or endurance exercises．Afterward, take 10 minutes to cool down slowly．Your heart should beat  normally when you stop．Do strength and endurance exercises on alternate days, so you will not overwork your body．Exercising as part of a group may help you to exercise regularly．
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Your body runs best on foods high in complex carbohydrates and low in fat and sugar．You also need a certain amount of protein and plenty of vitamins and minerals．Eating a healthy diet wil1 provide your body with everything it needs to run smoothly．Your body breaks down proteins into amino acids（氨基酸）, so you don’t need to buy the amino acids separately．