这个问题不是随便考虑一下就行了。
The subject deserves more than passing consideration.
吃顿便饭就行了，不用多破费。
A light meal will do; you needn’t go to big expense.
这本书大概浏览一下就行了。
It’s enough to have a browse of the book.
打个电话就行了，何须写信。
You don’t need to write a letter. Just give us a call.