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  3. Eating healthily costs about $1.50 more per person daily, according to the most thorough review yet of the affordability of a he

Eating healthily costs about $1.50 more per person daily, according to the most thorough review yet of the affordability of a he

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问题     Eating healthily costs about $1.50 more per person daily, according to the most thorough review yet of the affordability of a healthy diet.
    "For many low-income families, an【C1】________$1.50 daily is quite a lot," says Mayuree Rao, "It【C2】________to about $550 more per year per person, and that could be a real【C3】________to healthy eating."
    Rao and her colleagues reached their【C4】________after analysing 27 studies from 10 high-income countries, comparing price【C5】________for healthy versus unhealthy ingredients and diets.【C6】________one study compared the cost of a diet rich in fruit and vegetables versus one that was【C7】________in them. Another compared prices of【C8】________healthy and less healthy items, such as wholegrain versus white bread.
    Individual items were【C9】________matched in price. Meats【C10】________the largest difference: healthier options cost an average of 29 cents per serving more than unhealthy options.
    【C11】________this, comparisons of whole diets showed that healthier diets cost averagely $1.48 more per day.
    This shows that comparisons based on single ingredients don’t tell the full【C12】________. "It tells us that,【C13】________, it doesn’t cost more to eat healthier based on one nutrient," says Rao. "But there’s growing evidence that the【C14】________of foods in your diet【C15】________your disease risk more than any single nutrient, so we think our【C16】________finding that healthier diets cost about $1.50 more has the most public health【C17】________."
    As to why healthier food has become more【C18】________Rao says that it may be because the food industry organizes itself and the types of food it produces to【C19】________its own economies of scale,【C20】________than what’s best for consumers.  
【C17】
选项 A、strategy
B、relevance
C、tendency
D、suggestion
答案B
解析 该句用表转折关系的连词But引出文章的重要观点，即饮食中的食物组合比任何单一营养素对健康的影响更大，接着用表结果的连同so总结到，对健康饮食价格的研究与公共卫生健康关联最大，据此选B项relevance“相关性，意义”。健康饮食会多花1．50美元是对市场价格调查研究得出的结论，与公共健康策略无关，可排除A项strategy“策略”，也没有代表公共健康发展的趋势，亦排除C项tendency“倾向”。文章并没有提到任何公共健康方面的建议，所以也排除D项suggestion“建议”。
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