打人的家长当然做错了。孩子踢球砸中他人，真诚道歉、妥善处理，大概率能化干戈为玉帛。即便 彼此达不成和解，在冲突中保持克制，而不是冲动甚至动手，对身边的孩子来说，也是一种示范。 但是，这一事件不应该让高校刚刚打开的校门又开"倒车"。近年来，在舆论的持续呼吁下，高校逐 步重新开放了疫情期间关闭的大门，这一改变来之不易。但说实话，目前高校的开放程度仍未恢复 到疫情前的水平。一些著名的高校，预约的名额经常是一号难求。 因此，我们不应再纠结于高校是否应该开放的问题。即便发生了这样的冲突事件，答案依然明确： 高校应当开放。真正值得思考的是，高校应如何开放，以及在这一问题上我们应凝聚怎样的共识。 谈到高校如何开放，舆论中有一种声音——要在保障安全的前提下开放校门。这话当然没错，对任 何一所学校来说，校园安全都是重中之重。但问题是：我们是否应该追求绝对的安全？如果追求绝 对安全，代价又是什么？进一步说，哪些风险是必须极力避免的，而哪些风险是可以接受的？在谈 论校园安全至上时，我们要避免陷入安全主义的泥沼。在这个泥沼里，"安全"是压倒一切的，无论 潜在的危险多么微不足道。 封闭可以减少风险，开放会带来更多隐患，这就是硬币的两面 ...

Core Viewpoint - The debate surrounding the openness of universities is reignited by a recent incident at Shanghai Jiao Tong University, where a conflict between a parent and a student resulted in injury, raising concerns about campus safety and the implications of a more open environment [1][2] Group 1: Arguments for University Openness - Despite the incident, the consensus remains that universities should be open, focusing on how to achieve this openness while ensuring safety [2][3] - The pursuit of absolute safety may lead to excessive restrictions, which could hinder the educational environment and the growth of students [2][3] Group 2: Safety Concerns and Educational Impact - The concept of safetyism can lead to a detrimental impact on educational practices, affecting not only universities but also primary and secondary schools, where excessive caution limits children's growth opportunities [4] - The recent extension of break times for students reflects ongoing discussions about balancing safety with the need for freedom and risk-taking in educational settings [4]

Core Viewpoint - The article discusses the detrimental effects of smartphones on teenagers, highlighting a significant increase in mental health issues among youth linked to smartphone usage and social media exposure [1][4][6]. Group 1: Impact of Smartphones on Youth - The Netflix series "Chaos Teen Years" illustrates the violent consequences of online bullying and misogyny, prompting discussions about the dangers teenagers face in their own rooms rather than on the streets [1][2]. - The Australian government has taken legislative action by becoming the first country to set a minimum age for social media use, prohibiting access for those under 16 [2][4]. - The proliferation of smartphones has led to four fundamental harms for teenagers: fragmented attention, social deprivation, sleep deprivation, and addiction [6][7]. Group 2: Academic Insights and Recommendations - Jonathan Haidt's book "The Anxious Generation" reveals a close correlation between the rise of mental health issues in youth and smartphone usage, with a 150% increase in mental health problems in American teens since 2015 [4][6]. - Haidt suggests that children should not have smartphones before the age of 14 and should not have personal social media accounts before 16, advocating for more real-world playtime [8][9]. - The article emphasizes the need for a balance between protecting children from virtual dangers while allowing them to engage in real-world experiences, contrasting the overprotection in physical environments with the underprotection in virtual spaces [9][10].