阅读下面的短文，请根据短文后的要求答题（请注意问题后的字数要求）
People who drink a little, exercise, give up smoking and eat five servings of fruit and vegetables each day live on average 14 years longer than people who have none of these behaviors, researchers said on Tuesday . A collection of evidence has shown that these things contribute to healthier and longer lives, but the new study actually proved their mixed effect, the British team said.
“These results may provide further support for the idea that even small differences in lifestyle may make a big difference to health, ” the researchers wrote in the journal PLOS Medicine.
Between 1993 and 1997 the researchers questioned 20，000 healthy British men and women about their lifestyles. They also tested every participant’s(参与者) blood to measure vitamin C intake, an indicator（指标）of how much fruit and vegetables people ate.
Then they assigned(分配,分派)the participants---aged 45-79 a score of between 0 and 4，giving one point for each of the healthy behaviors. After allowing for age and other factors(因素) that could affect the likelihood of dying, the researchers found people with a score of 0 four times as likely to die.
The researchers, who tracked deaths among the participants until 2006，also said a person with a health score of 0 had the same risk of dying as someone with score of 4 who was 14 years older.
The lifestyle change with the biggest benefit was _____________________ ,which led to an 80 percent improvement in health, the study found. This was followed by eating fruits and vegetables. Drinking a little and keeping active brought the same benefits, Kay-Tee Khaw at the University of Cambridge said. Do you have the four healthy living habits?
小题1: What is the best title of the passage?（within 10 words））
____________             ____________________________________________.
小题2:Complete the following statement with proper words.( no more than 3 words)
_______               _ is an important figure to show how much fruit and vegetables people ate.
小题3: Fill in the blank in the last paragraph with a proper sentence.（within 3 words）
______________________________________________      ________      _.
小题4:What should be encouraged according to the result of the research?（within 10 words）
______________________________________________      ________      _.
小题5:What does the words “ these things”( Line 3, Paragraph 1) probably refer to? (no more than 15 words)
______________________________________________      ________      _.