本期内容：

There is little evidence screen use for children is harmful in itself, guidance from leading pediatricians says. It says there is no good evidence that time in front of a screen is "toxic" to health, as is sometimes claimed. While the guidance avoids setting screen time limits, it recommends not using them in the hour before bedtime. Meanwhile, a separate study has found that girls are twice as likely to show signs of depressive symptoms linked to social media use at age 14 compared with boys.

harmful: adj. 有害的
in itself: 本质上
pediatrician: n. 儿科医生；儿科专家
toxic: adj. 有毒的
recommend: v. 推荐
separate: adj. 单独的；分开的
depressive: adj. 抑郁的；压抑的

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