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People who are cheerful and relaxed are less likely to suffer from colds.It's possible that being full of vim and vigor helps the body fight illnesses,say the researchers from Carnegie Mellon University(CMC)in Pittsburgh.

"We need to take more seriously the possibility that a positive emotional style is a major player in disease risk,"says psychologist Sheldon Cohen,the study's lead researcher.

In a previous study,Cohen and his colleagues found that people who tended to be cheerful and lively were least likely to develop sniffles,coughs and other cold symptoms.People who showed positive feelings were also less likely to mention symptoms to their doctors,even when medical tests detected those symptoms.

Those findings were interesting,but they didn't prove that a person's attitude affects whether he or she gets sick.Instead,it was still possible that a person's underlying personality is what matters.

Evidence suggests,for instance,that certain people are naturally more likely to be outgoing and optimistic,with high self-esteem and a sense of control over life.This would mean that who we are,not how we feel,ultimately decides our chances of catching colds.

To figure out which mattered more,personality or emotions,the researchers interviewed 193 healthy adults.The researchers talked to each person over the phone every evening for 2 weeks. They told the researchers about the positive and negative feelings they had experienced that day.

The results showed that everyone in the study was equally likely to get infected.Their symptoms,however,differed depending on the types of emotions that they had reported over the previous fortnight.

Among those who reported good moods and had been infected with the flu virus,for example, 28 percent developed coughs and stuffy noses.On the other hand,those symptoms struck 41 percent of people who had been less positive.Scientists argue about whether negative emotions or positive emotions have a stronger effect on how healthy we are.For now,it can't hurt to look on the bright side more often than not!

1.What is the text mainly about?

A.How to get rid of colds.

B.Attitude determines life.

C.Smiles turn away colds.

D.Different opinions about colds.

2.The phrase"full of vim and vigor"underlined in Paragraph 1 probably means"

A.ignorant B.well-informed

C.energetic D.passive

3.According to the finding,a leading factor of catching colds should be one's.

A.health B.personality

C.quality D.mood

4.By saying the last paragraph,the writer intends to suggest

A.the saying-every coin has two sides

B.positive emotions are as good as negative emotions

C.it is not necessarily good for you if you always look at problems positively

D.it will be good for your health to always keep up an optimistic state of mind

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