Sometimes an answer could come from the comments under the question itself, and it may be what OP really wanted. But is there are a way to accept it, or close a question with a reason like answered in comments? Sometimes some questions will not need any further answers after comments (which happens quite often), but the question 'status' will still be as not yet answered and open.
To conclude: At least for me it would have been much more convenient, if there was a button on the post itself, that by clicking it would mark a question as comment answered or something like this. Thanks.