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世界卫生组织的古特霍尔德及其同事,在2003~2007年之间,调查了美洲、欧洲、亚洲34个国家共72845名青少年学生的生活习惯,发现无论是在富
Guthholder and his colleagues at the World Health Organization surveyed 72,845 young students living in 34 countries in the Americas, Europe and Asia between 2003 and 2007 and found that whether they were rich