Well, everyone's situation is different, and the course of disease is different. It is impossible to have only one dose. 30-60 ml per day, which can be understood as that as long as the illness is slightly serious, you can consider using a larger amount. Generally, you can also take the middle value. If it is just prevention, take a small dose; In addition, it is not necessary to use 50 ml and 60 ml, and the effect will be very different. As long as the doctor has no special instructions, I think 60 ml is enough for healthy adults. When the dose is high, I feel insecure, so I take it several times and three times with instructions, so I take 20ml each time.