I know there are a lot of mistakes in my writing,it doesn't matter recompose it Thanks very much！ I think Doctor is the hardest job. First,a doctor will possess professional skills and acknowledges.one wouldn't be a doctor permanently once he pass the assessment test.As a doctor,you should strengthen your skills constantly,otherwise would be deprived of qualifications of being a doctor. Second,a doctor would in the face of illness and death of patients.doctor would suffer mental pressure.A long term pressure would endanger doctor's health. Third,physician-patient relation is critical nowadays.The patient or patient's relatives have total unrealistic expectations and are likely to impose their anxiety on doctors.