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  3. What is the main finding of the study?

What is the main finding of the study?

admin2022-05-08  22
问题 What is the main finding of the study?
选项 A、It found little clear-cut evidence that screen time decreases adolescent well-being.
B、It found that adolescents’ total screen time per day had little impact on their mental health, both on weekends and weekdays.
C、It also found that the use of digital screens 2 hours, 1 hour, or 30 minutes before bedtime didn’t have clear associations with decreases in adolescent well-being.
D、All of the above.
答案D
解析 此次研究的主要发现是什么?一是没有发现能证明屏幕时间会影响青少年健康的明显证据(A)；二是每天的屏幕时间长短对青少年的心理健康没有什么影响，无论是在平时，还是在周末(B)；三是睡前半小时、1小时或2小时的屏幕时间对青少年的健康没有什么影响(C)。因此，答案是D。
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