The good news is that this brings a health benefit , Having a positive outlook on life reduces anxiety. A study of nearly 100，000 women showed a lower risk of death from heart disease among optimists.

But there are problems in always having an optimistic attitude. The authors of the study point out that the 2008 financial crisis may have been caused by analysts overestimating their assets' performance even in the face of clear evidence to the contrary.

There are personal health risks too. Dr Tali Sharot， lead researcher，said: '''Smoking Kills' messages don't work since people think their chances of cancer are low. There's a very fundamental tendency in thebrain."

But， as they say， every cloud has a silver lining. Even if seeing the world through rose-colored glasses poses a risk to our health， it's not something that is likely to cause us to lose sleep. Let's just keep our chins up and keep smiling!

11. What does “sanguine” (para.2) mean ?

A.Depressed

B Cheerful

C. Lucky

D. Emotional

12. Thestudy mentioned in Paragraph 2indicates that people______.

A. are more optimistic than they believe

B. are less optimistic than they believe

C. like good news more than they think

D. like good news less than they think

13 .What study mentioned in Paragraph 2 indicates that people _____.

A. Collecting false information

B. OveremJ1hasizing evidence.

C. Misjudging the situation.

D. Giving a pessimisticforecast.

14. Theauthor suggests in the last paragraph that we______

A. adjust our goals in life

B. learn to release bad mood

C. avoid being overoptimistic

D. maintain a positive attitude