2013年5月11日，某校8名八年级学生相约到江边烧烤。途中，1名男生下江游泳溺水，其4名同学发现后手牵着手去救他，不幸一起落入江中失踪。该事件启示我们未成年人（    ）

①要增强自我保护意识与能力             ②遇到险情时首先要保护自身利益

③既要见义勇为，又要见义智为         ④要依法维护自己的生命健康权

    Our school is on Guangming Street. It's next to the People's Library. There is a park across from our school. The pay phone is between our school and a post office. Our school is very beautiful. There are many trees and flowers in it. If you want to come to our school from the airport, take a taxi and go down Center Avenue. You can see a big restaurant on your right. There is a bridge near the restaurant. Go across it and turn left. Then go down Bridge Street. Turn left at New Park and go down Guangming Street. Our school is across from a bank.