I am not in Huiyang, but I am working in disease control, and the topic is not fixed. For example, I have printed a lot of papers here, each one is different, so I will give one at random during the exam. However, these topics are very simple. As long as you have enough common sense of life and think about how to do it healthily, you can basically get it. You don't have to be too nervous. If you really can't grasp it, choose the best one and you can basically pass.
For example, let me give you an example: spoiled vegetables can still be eaten after cooking for a long time.
You see, since it's all rotten, I don't know if it will have any effect when cooked, but if it's rotten, you should throw it away! So this is wrong!