once an old man went to see a doctor.的意思

once an old man went to see a doctor.的意思
Once an old man went to see a doctor.The doctor looked him over carefully and said,"Medicine
won't help you.You must have a good rest.Go to bed early,drink milk,walk a lot and smoke one cigar (雪茄烟) a day.Go to the country place for a month."
After a month the man came to see the doctor again."How are you?" said the doctor."I'm glad to
see you again.You look much younger." "Oh,doctor,I feel quite well now,"said the man."I had a good
rest.I went to bed early,drank a lot of milk and walked a lot.Your advice certainly helped me,but that
you told me to smoke one cigar a day almost killed(杀死) me first.It's no joke to start smoking at my