根据一项研究，如果孩子频繁使用社交媒体，特别是在晚上，他们的睡眠将会变差，也会感觉更焦虑和消沉。
According to the research, if a kid uses social media a lot, especially at night, he or she will sleep worse and feel more nervous and depressed.
根据一项研究，在美国，超过一半的少女认为她们应该节食，几乎五分之一的少年男孩担心自己的身体和体重。
According to a study, more than half the teenage girls in the USA think they should be on a diet and almost one in five teenage boys are worried about their bodies and their weight.
根据一项研究，学生的学习成绩并不是他们压力反应的唯一决定性因素。
According to one study, students' academic performance is not the only decisive factor of their stress responses.
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