why did people long ago often eat more food than they needed?

why did people long ago often eat more food than they needed?

题目
why did people long ago often eat more food than they needed?
why did people long ago often eat more food than they needed -- that is, they did they sometimes overea?
答案
为什么以前的人们总是吃饱后还要再吃呢?换句话说,为什么他们有时候会吃得过量呢?
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