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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.  
【C5】
选项 A、regulations
B、references
C、competitions
D、data
答案D
解析 空格上文用$1.50说明了人均每天在健康饮食上多花的金额，空格所在句又提到在10个国家进行了27项调查，对比健康和不健康的食品成分和饮食的价格，这些都是对事实数据的收集、比较、分析，从而得出结论，故选D项data“数据”文章没有涉及到健康或不健康食品的价格法规问题，可排除A项regulations“规则”；也没有提到不同食品或饮食的参考价格，亦排除B项。references“参考”：如果是健康食品与不健康食品的竞争，那么competitions“竞争”后面应该跟between．而不是for，故排除C项。
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