enough is enough是什么意思？

Question

原文：We have done away with the absurdly harsh laws of the nineteenth century and this is only right.But surely enough is enough.

Answer 1

1.
受够了
2.
够了，够了
没法再忍受了
3.
适可而止
4.
够了，别再闹了！

Answer 2

足够了就足够了
？还是
足够了就不用再多了？