Twenty or more. The number of people required for outpatient teaching in major hospitals is different. According to "Outpatient Teaching" written by PatrickCAlguireDawnE, it can be guaranteed that the daily workload of trained doctors should be greater than or equal to 20. Outpatient education refers to health education for patients during outpatient treatment. Because of the mobility and difference of outpatients, it is impossible to carry out health education according to the needs of each patient.