After studying for three years, it shows that there is no cure in the world. After three years of treatment, I realized that there is no cure in the world. "This is a warning from Sun Simiao, a famous doctor in the Tang Dynasty, to those ignorant and complacent doctors at that time. What he means is that these doctors are complacent and pretentious only by learning some medical books or even reading prescriptions, and think that all diseases can be cured, and there is nothing intractable in society; However, after clinical practice, when encountering ever-changing diseases, I feel that the skills I learned in the past are not enough. Not only difficult diseases are unbearable, but also common diseases. I feel that there is no good cure. This kind of doctor who is only satisfied with the existing superficial medical knowledge and refuses to study harder,