在mongodb中检查数据时如何放置“ and”功能?

How to put an "AND" function while checking for values in mongodb? Here Between statecode, countrycode and country.

err = collection3.Find(bson.M{"statecode": data.StateCode, "countrycode": data.CountryCode, "college": strings.TrimSpace(data.College)}).One(&mcollege)

it show show err == nil if the condition is met.