题目内容：

    Here’s a new reason to be an optimist. 1. Pessimists, of course, might have suspected this all along-but now there’s actual research behind it.

Boston-area scientists found the most optimistic people live an average of 11 to 15 percent longer than their more pessimistic peers.

In previous studies, researchers have found that more optimistic people tend to have lower risk of diseases and early death, said Lewina Lee, the lead researcher and a psychiatry professor at Boston University School of Medicine. “2.“

Optimists generally expect good things to happen in the future and feel like they can control important outcomes. They tend to stay positive whatever comes their way.

3. There’s good news: The mind-set is about 25 percent hereditary (遗传的). Lee said, meaning people have some control over their level of good thoughts. She said people can become more optimistic by imagining a future in which their goals have been reached.

To conduct their research. Lee and the other scientists compared results from two independently conducted studies-one that followed nearly 70,000 women for a decade and another that followed about 1,400 men for 30 years. 4. They ranked themselves on statements including in uncertain times, “I usually expect the best” or “I'm always optimistic about my future.”

The conclusion that optimistic people tend to live longer holds true regardless of other factors, Lee said.

The study leaves one question unanswered: 5. Although it's unclear, the researchers believe optimists may be better at regulating stressors and bouncing (反弹) back I from upsetting events. Optimists also generally have healthier habits, like exercising more and smoking less.

A.Not a natural optimist?

B.Our study took it one step further.

C.Why are optimists likely to live longer?

D.Why do women generally live longer than men?

E.An optimist sees the opportunity in every difficulty.

F.People self-reported their optimism on questionnaires.

G.Those who see the glass as half full, according to a new study, live longer.