单选题Reports in Health 101 Fitness magazine ______ body builders know about different vitamins that boost muscle growth,A helpB helpsC helpingD to help

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The Mind-Body Connections

Norman Cousins was a famous American magazine editor. In 1964,he returned from an overseas trip
and then became very ill.In the hospital,he had a terrible pain and couldn't move his body.Doctors told
him he had a serious disease called ankylosing spondylitis（强直性脊柱炎）and said he had only 1 chance in
500 of surviving. They gave him powerful drugs,but his condition only got worse.
Cousins had read about a theory that negative emotions can harm your health.He believed that positive
emotions were good for one's health,and he decided to try an experiment.He would fill his days with good
feelings and laughter and see if that might improve his condition.
He left the hospital and moved into a hotel room.There,he got a large supply of funny TV programs and
copies of old Marx Brothers movies and cartoons.He also hired a nurse to read funny stories to him.His plan
was to spend the whole day laughing and thinking about happy things.On his first night in the hotel,Cousins
found that laughing at the movies helped his body produce chemicals that reduced pain.For the first time in
weeks,he could sleep comfortably for a few hours.Every time the pain came back,he watched another
funny movie and laughed until he felt better.
Over time,Cousins was able to measure changes in his body with blood tests.He found that the harmful
chemicals in his body decreased at least 5 percent every time he watched a funny movie.After a short time,
he was able to stop taking all of his medications.Finally his condition improved so much that he could go
back to work.
Cousins later wrote a book about how laughter and happiness helped him to survive a deadly illness.
Many people didn't believe his story and said that his doctors were wrong about his disease.But since then,
research has found that emotions do have a strong effect on physical health,and experiments found that
laughter can help to reduce pain.Scientists today are working to understand the ways that our minds affect
our bodies.

Cousins spent a lot of time laughing every day.
A:Right
B:Wrong
C:Not mentioned

What must new members do before using the fitness center?

A.Get a health certificate from a doctor
B.Pay for a year's membership
C.Attend a training session on safety
D.Register with a personal trainer

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Eating Potatoes Gives Your Immune System a Boost
Eating potatoes is not only good for bowel health,but also for the whole immune system,especially when they come in the form of a potato salad or eaten cold.In a study on an animal model,researchers in Spain found that pigs fed large quantities of raw potato starch(RPS)not only had a healthier bowel,but also decreased levels of white blood cells,such as leucocytes and lymphocytes in their blood .White blood cells are produced as a result of inflammation or disease, generally when the body is challenged.
The general down-regulation of leucocytes observed by the Spanish researchers suggests an overali beneficial effect,a generally more healthy body.The reduction in leucocyte levels was about 15 percent. Lower lymphocyte levels are also indicative of reduced levels of inflammation, but the observed reduction in both lymphocyte density and lymphocyte apoptosis is surprising.
In what was the longest study of its kind,pigs were fed RPS over 14 weeks to find out the effect of starch on bowel health."The use of raw potato starch in this experiment is designed to simulate the effects of a diet high in resistant starch,"said study leader Jose Francisco Perez at the Universitat Autonoma de Barcelona,Spain.
Humans do not eat raw potatoes,but they do eat a lot of foods that contain resistant starch,
such as cold boiled potatoes,legumes,grains,green bananas,pasta and cereals.About 1 0 percent of the starch eaten by human is resistant starch-starch that is not digested in the small intestine and so is shunted into the large intestine where it ferments .Starch consumption is thought to reduce the risk of large bowel cancer and may also have an effect on irritable bowel syndrome (IBS).
Immunology expert Lena Ohman's team previously found that the overall lymphocyte levels do not vary for IBS patients,but that lymphocytes are transferred from the peripheral blood to the gut,which support the hypothesis of IBS being at least partially an inflammatory disorder. She says the decrease in lymphocytes observed by the Spanish is therefore interesting,and a diet of resistant starch may be worth trying in lBS patients.Ohman is currently at the Department of Internal Medicine,Goteborg University,Sweden.The study is published in the journal Chemistry and Industry,the magazine of the SCI.

What does the reduction in leucocyte levels in the body mean?
A: It may mean the reduced levels of inflammation.
B: It may mean somewhere in the body is inflamed.
C: It means that the body is challenged.
D: It means that the body cannot produce leucocytes any more.