On the way back to college, college students want to do personal protection. Here I have the following three suggestions. The first suggestion is to do personal protection. We must first choose a means of transportation as close as possible to others. Such a means of transportation is undoubtedly an airplane. Our teacher also specially advises students to fly after returning to school, because if they fly, they usually fly directly. For example, if you fly from this city and fly directly to that city, he won't stop over. In other words, the people on this plane are the same. Like a train, it may stop in every city, and people get on it in every city. It's a scary crowd. Therefore, for personal protection, he doesn't stop halfway, but the situation of taking the bus may be like some high-speed. For example, when we arrive at some rest stops, many people may go to the toilet. When we go to the toilet, there will be some people. Anyway, it is flowing outside. The smallest plane is definitely the most effective means of transportation, and it takes a short time. The second is, for example, when we take the train. We must wear masks before we arrive at the railway station. Don't take it off when we get to the railway station. We wore them until we got on the train. If you walk around, we must never take the initiative to stay in our seats. You may be influenced by some unhealthy people. In this case, you will be in trouble after being infected. So if we take the train, because we have to pass through many cities and railway stations, and because the flow of people is relatively large, in order to reduce contact with strangers, we must not walk around casually and reduce the chances of contacting strangers.