Your criticism is off the point.

你的批评离题了。

That is, well, excuse my hesitation, far off the point.

那个，呃，请原谅我的犹豫，很不切题。

Weve gone too far off the point. Lets return to the topic under discussion.

咱们离题太远了，还是回到正题上来吧。

You are wandering off the point again, do please try to keep to the subject.

我会尽快回家，不过离开办公室之前我有一个小问题要处理好。

The student received low marks for his essay, as much of it was off the point.

由于大部分内容都跑题了，这个同学的作文得分很低。