then the schools that had fewer of those policies.

肥胖症流行程度越小
This is a really interesting study

这个研究真的很有趣
because unlike just the others that look more at behavior,

因为与其他专注于行为的研究不同
this one actually found a link to student weight.

这一研究实际上与学生体重联系上了
In addition to those,

除此之外
there have been a number of large-scale studies

也有一些大规模的研究
that have tried to go in and do interventions at the school level

尝试着从学校的层面上进行干涉
to see if they can have an influence on student weight.

来观察它们是否能影响学生的体重
These tend to include

这些举措包括
things like nutrition and physical education;

加强营养与体育方面的教育
teaching the people working in the cafeteria

或让自助餐厅的工作人员
to do different types of cooking,

烹制特殊的食物