Possible reasons: 1. I didn’t practice well when I was a child; 2. I wrote it deliberately sloppily to prevent you from stealing his skills; 3. There were so many patients that I forced the doctor to write quickly, and added item 1. That would be even worse. 4. Every other line is like a mountain. Even if he writes in block letters, you may not be able to understand the content. The above reasons are for reference only.