Hermione appreciates questions, both asking and answering them, and so she'd be the last person to judge if he chooses to interrupt her to ask her what she'd talking about. It will especially be helpful later on down the line when she's talking to other people, as she doesn't want to take for granted that certain topics aren't universal.

"I more or less can figure that much out," she replies, shifting to her knees to help him set everything he's brought her. "But I'd appreciate learning what sort of things work here. I just know how to keep a wound covered until the person can go and see a professional. But there's no use holding onto what I used to know if I'm not going to augment it with what can be helpful here."