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Children should avoid screen time for at least an hour before bedtime and parents should lead by example, according to new guidelines. 根据新的准则，孩子们在入睡前一小时应该尽量避免接触电子屏幕，父母们也要发挥榜样作用。 The Royal College of Paediatrics and Child Health (RCPCH) says parents must ensure youngsters are not spending too long on smartphones, tablets or watching television, which can disturb sleep patterns and have knock-on effects. 英国皇家儿科与儿童保健学院(RCPCH)告诫家长，保证不要让孩子们花太多的时间在智能手机，平板和看电视上面，这些扰乱孩子们的睡眠规律，还有其他的连带效应。 In a UK first, the college has published guidance designed to help parents manage their children's screen time. Following a major review, they acknowledge that high levels of time are linked to a less healthy diet, a sedentary lifestyle and poorer mental health. 这在英国是首例，该学院出台指导方案帮助父母管理孩子接触屏幕的时间。在一次大规模的回放中发现，父母们都承认屏幕使用时间过长会导致不健康的饮食方式，养成久坐的习惯，心理健康问题会较差。 But experts said there was little evidence that screen time is directly ‘toxic’ to health. They stopped short of setting recommended time limits, saying there is insufficient evidence that screen time in itself is harmful to child health at any age. | 
