Don't eat more than is good for u 这句话是比较句吗

是比较句

这句话有问题，应该是Don't eat more than that is good for you.

是 后面省略了 you can eat

No.不要吃得更多，对你不太好。

这句话我看有问题，但是如果对的话，那是比较句。