WanttoLiveLonger？TurnoffYourTV!SeatingyourselfinfrontoftheTVprobablyisrelaxing，butspendingtoomuchtimeinfrontofthetubemaytakeyearsoffyourlife．That'swhatAustralianresearchersfoundwhentheycollectedTVviewing
Want to Live Longer？Turn off Your TV!
Seating yourself in front of the TV probably is relaxing，but spending too much time in front of the tube may take years off your life．
That's what Australian researchers found when they collected TV viewing information from more than 11，000people older than 25years．The study found that people who watched an average six hours of TV a day lived an average 4.8years less than those who didn't watch any television．Also，every hour of TV that participants watched after age 25was associated with a 22minute reduction in their life expectancy．
It's no mystery that sitting in front of the tube isn't exactly a healthy pursuit．The more TV you watch，the less physically active you are．And the less exercise you get，the more likely you are to develop diseases such as diabetes or heart problems．
Lennert Veerman at the University of Queensland is the lead author of the study．He acknowledges that it may not just be the longtime sitting nature of watching TV that lowers life expectancy，but also the poor diet that onscreen junk-food advertising can promote．But Veerman says that the association between watching too much TV and lower life expectancy persists，even after adjusting for diet．
Veerman says that it might make sense for doctors to start asking their patients about how much time they spend in front of the TV．This may be a better way to treat patients than just asking them to get more exercise or have a healthy diet．
Veerman points out that people who are concerned can simply turn off the TV and get off the couch．"Exercise is good，"he says，"but even light physical activity also improves health．"
58．The underlined word"tube"in the 1st paragraph refers to the___．
A．pipe
B．television
C．couch
D．table
59．Watching too much TV may shorten our life because___．
A．the lack of physical activity can lead to