With all the lowfat and fatfree products on the market，you'd think reducing fat intake would be the surest way to greater health.In fact，there is such a thing as too little fat.Strange but true：eating without fat can lead to vitamin deficiencies(维生素缺乏症)．That's because some vitamins require fat to be taken into the body and to do their jobs，which include providing energy，keeping the body working normally and supporting the body to fight against disease，for a start.Vitamins are necessary，which means fats are necessary，too.
Dietary fat，which comes from the food you eat，is crucial to the intake of the vitamins soluble(可溶的)in fat，which includes vitamins A，D，E and K．(Vitamin C，needed for healthy teeth，doesn't need fat) Among them，vitamin A is necessary for good eyesight，and vitamin D for bone health.
When vitamins which are soluble in fat are taken in，they move from the mouth to the stomach and then to the small intestine(小肠)．Fats can move across the cell walls(细胞壁) of the small intestine and enter the body's general movement of blood.Any vitamins in that fat are taken into the body as well.The vitamins are then carried to the liver(肝脏)，where they're stored until the body needs them.
Without enough fat in your diet，your body cannot successfully take in the fatsoluble vitamins that are necessary to your health.However，the types of fat you eat matter a lot.There are some important rules to follow，including：avoid unhealthy fats and plant fats are best.Besides，eat healthy oils.Last but not least，don't overdo it.You only need a small amount of fat to help take in vitamins.Just a little with any vitaminrich meal and it'll get those vitamins into position to do some good.
5．The first paragraph mainly talks about ________.
A．why lowfat products are popular
B．the best way to stay healthy
C．the importance of different vitamins
D．the important part that fat plays
6．Eating fatfree meals can result in the shortage of vitamins because ________.
A．some vitamins can be taken in with the help of fat
B．vitamins are sometimes hard to be taken in
C．eating without fat makes the body too weak
D．fatfree meals make people eat fewer vegetables
7．Which of the following might be the result of fatfree diets?
A．Bad teeth. B．Overweight.
C．Hair loss. D．Soft bones in legs.
8．How many tips are mentioned on taking in fat?
A．Two. B．Three.
C．Four. D．Five.