7．
Diet drinks may taste good，but they might not bring happiness．A new study finds that people who drink diet sodas or fruit drinks are more likely to be diagnosed （診斷） with depression．
The study doesn't show that diet drinks cause depression and the researchers stress their findings don't provide an explanation．They looked at more than 263，900U．S．a(chǎn)dults ages 50to 71who answered questions about their beverage （飲料） consumption（攝入量） between the years 1995and 1996．About 10years later （from 2004to 2006），the same people were asked if a doctor had diagnosed them with depression since the year 2000．
People who regularly drank four or more cans of any type of soda a day were 30percent more likely to have received a diagnosis of depression than people who did not drink soda，said Dr．Honglei Chen of the National Institutes of Health，who led the study．The risk of depression was especially high for people who drank diet soda-a 31percent increased risk compared to a 22percent increased risk for those who drank regular soda，the researchers said．
Those who drank four or more cans of diet fruit drinks were 51percent more likely to be diagnosed with depression compared to those who did not drink diet fruit drinks．
By contrast，people who drank four or more cups of coffee a day were 10percent less likely to have been diagnosed with depression compared to non-coffee drinkers．
The study only found an association，and did not determine （確定） whether diet soda or fruit drinks caused depression．Although the researchers took into account factors that could affect the results，such as age，sex，education，smoking status，physical activity，body mass index （BMI） and energy intake，it's possible other circumstances，such as a family history of depression or stressful life events，could explain the association．
A family history of depression and stressful life events are some of the biggest predictors of depression，said Emma Robertson-Blackmore，assistant professor of psychiatry at the University of Rochester Medical Center，who was not involved in the study．In addition，older people are more likely to experience stressful life events，including the death of a loved one，job changes or illnesses，Robertson-Blackmore said．
However，the findings agree with those of a few previous studies that found a link between frequent consumption of sweetened beverages and a higher prevalence （流行程度） of depression，the researchers said．（Diet sodas and fruit drinks are sweetened，but their sweeteners contain no calories．）
"More research is needed to confirm these findings，and people with depression should continue to take depression medications prescribed by their doctors，"said Chen．
56．People who drink four or moreC every day are the most likely to feel depressed．
A．cups of coffee
B．cans of fruit drinks
C．cans of diet soda
D．cans of regular soda
57．The underlined phrase"took into account"meansD．
A．checked out
B．went through
C．drew a conclusion
D．paid attention to
58．What can we learn from Dr．Honglei Chen's study？C
A．Diet drinks taste good but they don't always bring happiness．
B．Drinking a lot of diet drinks regularly will lead to depression．
C．There is a close connection between diet drinks and depression．
D．Stressful life events can explain why people may feel depressed．
59．What is the purpose of the writer writing the article？B
A．To find out why diet drinking leads to depression．
B．To present findings on diet drinking and depression．
C．To warn us against drinking diet soda or fruit drinks．
D．To suggest a healthy way of drinking for a better life．
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r at the city's underground stations．They have been well received so far，"said Feng Juan，an engineer from the company which makes the machines．"People are encouraged and paid for turning waste into treasure（財寶）．More than 30，000empty bottles have been collected since December，"she said．