【正确答案】正确答案： Medical Education It is not easy to become a doctor in the United States. / Students must attend a college or university and do well in their studies. / Once in medical school, students spend their first two years mainly in classroom study. / They learn about the body and all its systems. / They also begin studying how to recognize and treat disease. / By the third year, students begin working with patients in hospitals. / Experienced doctors who have treated many patients guide them as they work. / During the fourth year, students begin applying to programs in hospitals / for the additional training they will need after medical school. /