而且，长期以来，大多数政府反肥胖教育的重点都集中在刻板地调节卡路里摄入量，而没有考虑不同食物对食欲的显著差异性影响（正如哈佛大学医学院教授大卫·路德维格（David Ludwig）在他的优秀新著《永远饥饿》中指出的那样 ） 。
And, for too long, most government anti-obesity education has focused on mechanically regulating calorie intake, without taking into account that different foods have dramatically different effects on appetite (as David Ludwig, a professor at Harvard Medical School, emphasizes in his excellent new book Always Hungry).