Go for it.

去试试吧。

Sure.

当然。

Go by the book.

照章办事。

You get an a for effort.

你尽了最大的努力。

I know how you feel, but there's no need to go on and on about it.

我知道你的感受，可是也没必要这样没完没了。

I'm afraid we don't see eye to eye on this.

恐怕我们在这一点上达不成共识。（see eye to eye on sth : 对某事看法一致。）