For more than five thousand years Chinese doctors have used needles to fight illness. This

kind of medicine is called acupuncture. The doctor studies the sick person carefully. Then he puts needles into that person's body at the right places for his illness. Chinese doctors believe that they can control the body's natural forces in this way. At first, doctors in the West thought that this was just another kind of magic. Recently, however, they have found out that it is possible to cure many illnesses like this because the needles help the body to produce its own "medicines". In this way the body cures itself.

Nowadays doctors can do a lot of wonderful things. They can use thousands of medicines. They can give you pills and injections. They can even give you mechanical legs or a new heart. Sometimes modern medicine works like magic. But there are still a lot of illnesses that drugs and machines cannot cure completely. Medicine is not only a science; it is an art, too. And in the art of medicine, the mind is very important. You will not have a healthy body unless you have a healthy mind.

The general idea of the passage is that______.

A．doctors can produce magic.

B．medicine has magic power.

C．modern medicine can cure all illnesses.

D．a healthy mind is also a cure for illness.