Children and teenagers who spend lots of time in front of screens---especially TVs---are easier to get more weight as they grow, according to a new study.
The findings agree with the research suggesting all that inactive sitting and always watching advertisements may lead to poor eating habits.
Researchers used results from a long-term study of children who took part in the surveys every two years. Children were between ages 9 and 16 when the study started. Out of 4,300 girls in the study, 17 percent were overweight or obese（肥胖的）. Twenty-four percent of the 3,500 boys were also above a healthy weight.
The surveys included questions about their height and weight as well as how much time they spent watching TV and DVDs and playing computer and video games.
From one survey to the next, each one-hour increase in children’s daily TV watching was in connection with an increase of about 0.1 points on a body mass index (BMI)（体质指数）, which measures weight in connection with height. There’s an increase of about half a pound in weight per extra hour of TV.
“The weight of the evidence is so strong that television watching is connected with unhealthy changes in weight among youth,” says Jennifer Falbe, who led the study while at the Harvard School of Public Health in Boston.
“It's important for parents to know that all the obesity-causing（引起肥胖的）screens really should be limited in their children's lives.” Falbe says. “When children watch TV, there are many food advertisements on TV that might lead them to eat a cookie or drink a soft drink.” What's more, she says, “they can get into a hibernating(冬眠) state on the sofa, even if children are sitting down while playing a computer game.”
小题1:Which of the following statements can be the best title for the text?
A．A new study on screens.
B．TVs do harm to children.
C．The less TV time, the fatter.
D．Too much screen time leads to obesity.小题2: How many children took part in the study?
A．4,300
B．3,500
C．7,800
D．9,800小题3:According to the study, one extra hour screen time will cause children about ______ pound
fatter.
A．0.1
B．0.5
C．0.3
D．0.7小题4:According to Falbe , what should parents do to stop children getting fat?
A．Limiting the time of children watching TV.
B．Buying children food advertised on TV.
C．Not allowing children to watch TV.
D．Encouraging children to play computer games.