Although we have not been taught by this teacher, we can see from her behavior that this is a good teacher with a very good ethics. Even if you go to work sick, you should always think of the students you teach. This attitude of carrying out the responsibility to the end is very worthy of our praise and study. In the video, the teacher is lecturing in the lecture hall, because the infusion tube is attached to his hand, so the movement can't be too big, and the infusion bottle is hung high on the blackboard.
So have you ever wondered why we always hang the infusion bottle high when infusion? In fact, if the infusion bottle is hung too low, your blood will flow back into the infusion tube, and once the human blood flows out, it is likely to cause some health and safety hazards and pose a threat to human health.
Before, when I went to play the infusion bottle, I held it myself because no one helped me carry it, but I was too young to understand, thinking that I just needed to hold the infusion bottle. Then because I held the infusion bottle too low, the blood flowed back, and the whole infusion tube was red by one third. There is also the possibility of blood backflow when playing mobile games, so if you are playing an infusion bottle, you should wait until the infusion bottle is finished before doing anything else, otherwise this blood backflow will really make people's backs cold. After that, I realized that we must pay attention to the position of the infusion bottle when infusion, and don't do anything drastic. We should be responsible for our own health.