There is a difference between leadership and babysitting

The associate keeps making stupid mistakes, a lot times, he sends out things without me reviewing it first.
When I ask why you did that way, he couldn't even answer.

I find most of the time, it is just a lack of the sense of responsibility.

I want to help him, so I helped him phrased the Email, and the wording, etc. I told him that just put in the attachment and it's good to go. And guess what, next morning, I come in, the attachment is totally unrelated to the Email! Can't you just double check things before it goes out to senior audience, such a simple thing that you would expect any responsible and reasonable person to do.

What can I say?