and ultimately their health.

最终改善他们的健康
Let's say you have four schools available to do this kind of thing.

假如你有四个学校可供研究
How would you design the study?

你将如何设计实验
Trying to be as scientifically sound as possible,

尽量科学合理
you have an intervention,

你有一项措施
you hypothesize that it's going to help kids,

你假设这对孩子们有帮助
and you want to find out whether it really does,

然后你想证实它是否真的起作用
and you're lucky enough to get four schools to work with:

而且你运气很好有四所学校可供研究
how would you design a study like this?

你怎么设计这样一项研究
Anybody take a shot at it?

有人想试试吗
There's a pretty straightforward initial answer, yes.

有个非常简单明了的初步解答请讲
Okay, so that would be the typical approach,

这是个典型的方案