设计：对学前教育者收集的儿童关于生长、锻炼以及营养流行病学方面的资料进行分析。

Design: the analyses were performed using data from the Growth, Exercise and Nutrition Epidemiological Study in preSchoolers.

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人口和流行病学方面的转变现与营养和行为方面的转变结合起来，产生不祥的新趋势。

Demographic and epidemiological transitions now combine with nutritional and behavioural transitions to create ominous new trends.

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在哈佛大学公共卫生学院的营养学和流行病学教授Edward Giovannucci补充道,很少有人会将一次研究结论广泛推荐给大众.

Edward Giovannucci , a professor of nutrition and epidemiology at the Harvard School of Public Health, added: 'It is very rare a single study should be used to make a broad recommendation.'

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