If you ask others this question, most people will tell you to be careful, carefully examine the question and read every information point clearly. But in fact, a careless person is inevitable, and he will make low-level mistakes every time because of carelessness. Later, when he found out, he silently told himself that he must pay attention next time, but it will be the same next time. I feel that you still haven't suffered a big loss because of making a small mistake. Only those unforgettable pains will stimulate your nerves and truly be watertight.