题目内容
C
Less TV Reduce Kids Weight
PALO AITO, California—“ Switching off the television may help prevent children from getting fatter—even if they do not change their diet or increase the amount they exercise,” US researchers said last week.
A study of 192 third and fourth grades, generally aged eight and nine, found that children who cut the number of hours spent watching television gained nearly two pounds （0.91 kg ） less over a one-year period than those who did not change their television diet.
“The findings are important because they show that weight loss can only be the result of a reduction in television viewing and not any other activity,” said Thomas Robinson, a pediatrician （儿科专家）at Stanford University.
“ American children spend an average of more than four hours per day watching television and videos or playing games, and rates of childhood being very fat have doubt over the past 20 years,” Robinson said.
In the study, presented this week to the Pediatric Academic Societies’ annual meeting in San Francisco, the researchers persuaded about 100 of the students to reduce their television viewing by one-quarter to one-third.
Children watching fewer hours of television showed a significantly smaller increase in waist size and had less body fat than other students who continue their normal television viewing, even though neither group ate a special diet nor took part in any extra exercise.
“One explanation for the weight loss could be the children unstuck to the television may simply have been moving around and burning off calories,” Robinson said.
“Another reason might be due to eating fewer meals in front of the television. Some studies have suggested that eating in front of the TV encourages people to eat more,” Robinson added.
66. The author tries to tell us in the first two paragraphs that ____.
A. children will get fatter if they eat too much.
B. children will get thinner if they eat less.
C. children will get fatter if they spend less time watching TV.
D. children will get fatter if they spend more time watching TV.
67. According to the passage, the time American children usually spend on watching TV ____.
A. is more than four hours a day. B. is less than four hours a day.
C. doubled in the last twenty years. D. is more than on any other activities.
68. The time children spend on TV viewing every day is suggested to be about ___.
A. six hours B. eight hours C. three hours D. one hour
69. Which of the following is right ?
A. Children usually eat fewer while watching TV.
B. Children usually eat more while watching TV.
C. Children eat the same amount of meals while watching TV.
D. Children usually eat nothing while watching TV.
70. Why can watching TV increase kids’ weight according to the passage ?
A. They usually eat more while watching TV.
B. They burn off fewer calories.
C. They change their diet while watching TV.
D. Both A and B
66---70 DACBD
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For better eyesight, doctors advise limiting the hours of screen time and encourage having enough eye resting time.
However, another study shows that sitting in front of computer or TV screens for long hours is not the only reason for myopia（近视）. An Australian research team studied young children in Sydney and Singapore to find the reasons for myopia.
The research team found that the prevalence（流行）of myopia among children in Sydney was lower than children in Singapore, even though they spent more time in front of computer and TV screens. The major finding is that children in Sydney spend longer hours on outdoor activities than those in Singapore.
Indoor and outdoor sports activities both make the eyes focus on more distant objects, which prevents the eyes from changing shape. But outdoor activities may better help avoid myopia than indoor sports activities.
Jane Gwiazda, who does research in sight problems, says: “Natural light is good for eye growth. And extra vitamin D from the sun might contribute to eye growth.”
Many doctors suggest that every child get its first eye test done when he/she is about two and half years old, and even if his/her sight seems perfect.
It is necessary for myopic children to wear glasses to prevent headaches, trouble reading or injuries. It is also important that schools invite doctors to test their students’ eyes.
If that is not possible, school teachers should at least encourage parents and children to have regular eye examinations and wear glasses. And parents should remember not only to limit the total screen time for their children, but also to encourage them to spend time outdoors.
【小题1】What’s the aim of the study by the Australian research team ?
| A．To find the reasons for myopia. |
| B．To find the ways to treat myopia. |
| C．To prove the bad effects of myopia. |
| D．To prove the prevalence of myopia. |
| A．Because Sydney children watch less TV. |
| B．Because Sydney children have more eye resting time. |
| C．Because Sydney children use computers less. |
| D．Because Sydney children do more outdoor sports. |
| A．Sydney children don’t study hard. |
| B．Singapore children do few exercises. |
| C．Outdoor activities do more good to eyes. |
| D．Room light does harm to children’s eyes. |
| A．Children should have eye tests as soon as they reach school age. |
| B．Doing outdoor activities with no glasses is good for myopia children. |
| C．Focusing on distant objects can help the eyes keep their original shape. |
| D．Children should limit their time in the sun in order to protect their eyes. |