如何在go-pg (Postgres ORM with Go)中查询嵌套结构中的子字段？

type User struct {
    ID     int
    Name   string
    Profile struct {
        Age  int
        City string
    }
}

func main() {
    db := pg.Connect(&pg.Options{
        User:     "your_username",
        Password: "your_password",
        Database: "your_database",
    })

    var users []User
    err := db.Model(&users).
        Column("user.*", "Profile.Age").
        Select()
    if err != nil {
        panic(err)
    }

    fmt.Println(users)
}