阅读下面的材料，然后按要求写一篇150词左右的英语短文。
1. There are plenty of good things about social media, but also many potential dangers to teens from them. Teens don’t always make the smartest choices when visiting social networking sites, and sometimes this can lead to problems. |
2. More than half of American teens visit social networking sites daily and the number of American teens doing that is increasing. Social media can be distracting and can negatively impact learning. Studies found that students in middle school, high school and college who checked social media at least once during a 15-minute study period achieved lower grades. |
3. These statistics about American teens highlight the dangers of social media:  |
【写作内容】
用约30个单词概括上述信息的主要内容；
结合上述信息及日常生活，简要分析社交网络对青少年产生的负面影响；
你认为应该如何引导青少年正确使用社交网络。
【写作要求】
写作过程中不能直接引用原文语句；作文中不能出现真实姓名和学校名称；
不必写标题。内容完整，语言规范，语篇连贯，词数适当。
_________________________________________________________________________________
__________________________________________________________________________________