1, a large number of algae, grass and sediment enter the nose and mouth, trachea and lungs, blocking the respiratory tract and suffocating.

2, panic, cold will make throat spasm, respiratory obstruction and suffocation.

3, weekends, holidays, winter and summer vacations are strictly prohibited to play and swim in places such as rivers, ponds and uncovered wells. You can't go fishing, swimming or playing with water by the pond alone or in groups.

Don't play with water or swim on the way to class or school.

Many students can't swim. If students are found to have fallen into reservoirs, ponds, wells, etc. Minors can't rush into the water to rescue. They should ask adults for help or call "1 10".

6. Remember, don't let the drowning person catch your body or limbs. If a drowning person tries to get close to you, let go immediately.