Present perfect or present continuous

Either could be correct.

1. We use the present perfect tense to talk about things where there is a connection between the past and the present.

He has written 16 books. He started writing books at some time in the past. So far, he has written 16 books. He may write more books.

I have painted the living room blue. The focus is on the finished result. The activity is finished but we can see the result now.

I have read that book you lent me. I finished it yesterday.

2. We use the present perfect continuous when the focus is on an activity that is unfinished.

I have been decorating the house this summer. The focus is on the action – decorating – and the action is unfinished.

I have been reading that book you lent me. I have got another 50 pages to read.

I don't know why some DICK voted me down there.

Thanks for your reply

On the down vote, that's been going on today. Not relevant to the question.

He has been working as a botanist since his graduation