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  3. Nutritional(营养的) status affects children’ s behavior. Well-nourished children are more alert and attentive and are better able t

Nutritional(营养的) status affects children’ s behavior. Well-nourished children are more alert and attentive and are better able t

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问题    Nutritional(营养的) status affects children’ s behavior. Well-nourished children are more alert and attentive and are better able to benefit from physical and learning experience. Poorly nourished children may be quiet and withdrawn, or too active during class activities. Fat children also face many problems. They are often slow and less able to participate in physical activities. They may suffer from being laughed at and emotional stress by being excluded from playmates.
   Children’ s resistance to infection and illness is also definitely influenced by their nutritional status. Children who are well nourished are less likely to become ill: they also recover more quickly when they are sick. Poorly nourished children are more sensitive to infections and illness. Illness also increases the need for some nutrients. Thus poor nutrition creates a cycle of illness, poorer nutritional status, and lowered resistance to illness.
   Malnutrition is a serious problem for many young children but it is not always associated with poverty or a poor environment. Children of middle and upper income families may also be malnourished because of unwise food selections. Malnutrition occurs when there is prolonged (拖延的) imbalance of the nutrients that are required and the nutrients that are actually eaten. Malnutrition may be the result of under-nutrition or over-nutrition.
   It is important that both of these conditions be avoided in young children. An adequate intake of all required nutrients is most vital during early periods of growth and development. Also, the effects of nutritional deficiency on physical development during early childhood are less likely to be changed by improved dietary intake later.
What’ s the main idea of the passage?
选项 A、The difference between well and poorly nourished children.
B、The effects of nutrition on children.
C、The cause of malnutrition.
D、The importance of balanced dietary intake.
答案B
解析 文章第一、二段讲述了营养对孩子的行为、健康状况的影响，第三段讲述了孩子营养不良的原因，最后一段讲述了如何让孩子保持营养均衡。选项A“营养良好和营养不良孩子的区别”，选项C“营养不良的成因”，选项D“均衡饮食的重要性”均不能概括文章大意。故选B。
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