The causes of obesity are complex, and the science of understanding human behavior is embryonic; but it is not hyperbole to call the problem an epidemic. According to the Centers for Disease Control and Prevention, roughly 18% of children aged 6-11 in the US are not just overweight, but obese.
肥胖的原因非常复杂，而理解人类行为的科学尚处于萌芽时期；但可以毫不夸张地用普遍来形容这个问题。据疾病预防控制中心统计，美国6-11岁儿童中约有18%已越过超重阶段出现了肥胖问题。