为一篇文章提供一些修改建议。
文章内容:
"John is a great lawyer. He has successfully handled many cases in his career. He is a very knowledgeable and experienced professional."
Here are some suggested modifications to the article:

1. Add more details and examples to support John's skills and accomplishments as a lawyer. What type of cases did he handle? What were the outcomes? How did he demonstrate his knowledge and experience?

2. Consider using more vivid language to describe John's qualities. For example, instead of saying he is "very knowledgeable," try using a more specific adjective like "erudite" or "savvy." This will make the description more compelling and memorable.

3. Consider placing John's accomplishments and skills in context. For example, instead of simply saying he has handled many cases, compare this to the average number of cases that lawyers in his field handle.

4. Finally, consider adding a conclusion that ties back to the beginning of the article. For example, you might say that John's skills and accomplishments make him a valuable asset to his clients or his firm.