1. For those who can't swim. Drowning people are mostly due to negligence, some because they go fishing or shrimp fishing, and some because they play by the water or ice and accidentally fall into the river. 2. Suitable for people who can swim but can't swim very well. Drowning is mostly due to bluffing. I think I can swim, so I show my ability in the water. Swimming in the water for a while without paying attention to rest, swimming far away to the deep water area, drowned because of physical exhaustion and not coming back.

3. For people who can swim and have good water. Drowning is caused by a sudden cramp in the leg in the water, which leads to drowning in a moment of tension and panic. Some people get carried away because they play in the water for fun, and carry out some dangerous actions, resulting in accidental drowning.

Article 2 How to prevent drowning

1. To prevent drowning, you must remember the "six noes": don't swim in the water without permission; Don't swim with others without authorization; Don't swim without parents or teachers; Swimming in waters without safety facilities and rescuers; Don't swim in unfamiliar waters; Students who are not familiar with water are not allowed to go into the water for rescue. 2. Do full-body exercise before swimming, fully exercise joints and relax muscles to avoid cramps, sprains and other accidents after entering the water. If you have a cramp, be calm, don't panic, and help yourself while shouting. Common is calf cramp. At this time, you should do backstroke, hold your toes with your hands, push your calves forward hard, and try to get close to shallow water or shore.

3. Swimming time should not be too long. You should go ashore and rest for 20 to 30 minutes, and each swimming time should not exceed 2 hours.

It is not advisable to swim in too cold water. If you feel that there is a big difference between the water temperature and the body temperature, you should slowly enter the water, gradually adapt to it, minimize the number of times, and reduce the stimulation of cold water to the body.

5. When swimming, you can't shout, play tricks, push down your partner, pull your partner deeply or sneak up on your partner by diving. Students who just learn to swim can't do this.

What if someone drowns?

Students, you must remember that you are still students, with little strength and little experience. If you find someone drowning, don't rush into the water to save him, because if you are caught by the drowning person, it will be very dangerous. Entanglement with drowning people in water will consume a lot of your physical strength, which may lead to drowning or even death. Therefore, if someone falls into the water, the most correct way is to call for help immediately and seek the help of adults. At the same time, you can throw lifebuoys, bamboo poles, boards, etc. Help the drowning man escape. Eat safely, don't be greedy when you see food, and wash your hands before eating;

Eat melons and fruits, wash them first to prevent pesticide infectious diseases; Don't overeat, don't overeat, eat less fish and meat, less sugar and less salt;

Chew slowly and develop healthy habits.

On holidays, some students eat and drink when they see delicious food at home or travel. It is very dangerous to pick up special snacks or fresh fruits at scenic spots. Students must also remember that in diet, priority should be given to ensuring good health, eating well, eating safely and eating healthily. It is very important to prevent food poisoning. We must do the following:

1. Develop good hygiene habits and wash your hands before and after meals.

2. During holidays, be careful not to overeat, live a regular life, take an active part in physical exercise, enhance immunity and resist the invasion of bacteria.

During the summer vacation, the weather is hot, so students should not eat too much too cold. You can only eat 1-2 frozen fruits at a time. Don't eat a big box of ice cream at one go. When buying food, especially snacks, don't just look at its colorful appearance, but look at its production date and shelf life. You can't buy expired food and "three noes" food without factory name, address and production date. Food should be thoroughly cleaned before eating, and raw fruits and vegetables should be washed. If necessary, they can soak in cold water for half an hour and then rinse before eating. Never eat moldy food (there are mildew spots on fruits), because the mold inside will cause poisoning. 6. Don't eat food of unknown origin. Don't eat food if you don't know why you want to grow it. When you play in the wild and woodland, don't be confused by those beautiful fruits and mushrooms. The food found on the road is inedible. In case of eating toxic food by mistake, it is easy to endanger life if the treatment is not timely. 7. Don't buy food from vendors without hygiene license. Especially in tourist attractions, you will often meet some locals selling local specialty foods. At this time, you must see clearly. If you don't know, you can consult a tour guide or local people and choose reliable shops, supermarkets and fixed booths to buy. 8. Don't drink raw water, unclean water or expired drinks. Drinking your own boiled water while traveling can quench your thirst and be healthy. You can see clear mountain springs in the mountains. If the manager doesn't tell you that you can drink it, don't scoop it easily. Some mountain springs may be polluted, and some mountain springs contain minerals that are not suitable for human body to absorb. Drinking them may cause adverse reactions.