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“给定资料8”提到“生态安全已经向我们敲起了警钟”。请结合“给定资料8”针对警钟“问题，提出对策和建议。 要求：条理清晰。对策建议有针对性，切实可行，不超过300字。
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Mobile phones help us communicate everywhere, which is very important. They are good at emergencies, when you’ve (21) a car accident, for instance. A mobile phone (22) save your life! Mobile phones are also (23) because they have many good features--we can take photos and send them all over the world. But every coin has two sides. The (24) thing about mobile phones is that you have no privacy. My boss and friends find me whenever they want! I haven’t enjoyed a whole quiet day since the day I (25) my mobile phone. (26) disadvantage is that mobile phones make us lose good habits, such as punctuality. Before, when we (27) keep in touch so easily, if we had a date with someone, we tried our best to arrive (28) time. But now, because of the mobile phone, we are not afraid of (29) late any more, so, surprisingly enough, we make people wait! The third (30) I see is that I change my mobile phone once a year, and this means I’m spending (31) too much money on it. I think it is important to think (32) we use mobile phones. We should use things such as mobile phones, laptops, cameras, the Internet, and so on, (33) our needs. We can (34) our mobile phone when we don’t want to be disturbed by (35) . If we know how to use it, we can eliminate its disadvantages. 25（）
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Some college students drink too much alcohol at school. Many of them live on the campus. Heavy drinking has caused many problems. It can cause students to make bad choices and do dangerous things.One college has decided to ban alcohol. It has gotten a reputation as a party school. Five students at the college have died from drinking too much alcohol. Recently, one student drank too much vodka. He slipped into a coma. The college hopes the new rule will prevent any more tragedies.The new rule prohibits students from drinking alcohol in the dorms. The first time a student breaks the rule they will receive a warning. If they break the rule again, they will be evicted from the dorm. However, they will still have to pay for the dorm. Some students do not live on the campus. They live in houses near the campus. Those students are also banned from drinking alcohol, even if they are of legal age.Freshmen at the college are now required to take a special course. The course is called AlcoholEdu, and lasts for two and a half hours. The students learn about the dangers of alcohol. They also take a survey to find out how much they know about alcohol. All first-year students must pass the course.The college hopes that more information will help students make better choices. How do officials know that alcohol is a problem at the school（）
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