Girls, hello, my daughter has had diarrhea for five days now, once a day…

Girls, hello, my daughter has had diarrhea for five days now, once a day only a little bit, what can I drink? We went to the doctor today, she's very young and inexperienced, she didn't say much at all. Can you suggest something effective that will help with the diarrhea besides the diarrhea itself? Nothing else bothers her.