Well, she could only deal with one at a time.
I just didn't know how to deal with it at the time.
I think it best if we deal with one problem at a time, however.
Schools would deal with one or two topics at a time.
This way they can deal with several small insects at the same time.
We will have to deal with the problem jointly and at the same time.
"I can't deal with more than one patient at a time."
Not something he cared to deal with at a time like this.
So the player can deal cards from the stock one at a time.
How about if we deal with questions, but one at a time?