推荐信修改建议：提升Bohon Chen博士申请的成功率

{"title": "请指出这封推荐信存在的问题并给出存在问题的句子的详细修改意见和修改后的句子。", "content": "I am writing to provide my strong recommendation for Bohan Chen's admission to your doctoral program in Environmental Engineering. As a full professor in the School of Civil and Environmental Engineering at XXX, I have worked with Bohan as his mentor since September 2020 and have had the pleasure of getting to know him in both academic and personal contexts.\nBohan is an exceptional student with a deep passion for research and study. He consistently spent long hours in the lab, conducting experiments and analyzing data to ensure accurate results. In my course Environmental Organic Chemistry, Bohan demonstrated great diligence and commitment to the subject matter, ultimately earning an A grade (top 20%). In another class I taught, Environmental Engineering Special Subject, he achieved an A plus grade (top 10%).\nBohan has demonstrated a remarkable ability for independent thinking and self-motivation. His thesis project, which focuses on enhanced biological phosphate removal in secondary effluent treatment, required him to learn many new skills and knowledge, as he had no prior experience in this area. Despite the challenges he faced, Bohan remained patient and persistent, dedicating a significant amount of time and effort to investigating the mechanisms behind activated sludge granulation. His excellent execution in experiments, curiosity to explore new avenues of research, and sharp analytical skills in interpreting data highlight his potential as a researcher.\nBohan actively collaborated with team members, effectively communicating ideas and providing valuable insights during group discussions. His responsible and diligent approach to his work on other projects ensured the timely completion of high-quality deliverables. I have no doubt that he will continue to grow and improve as he pursues his academic and professional goals.\nOverall, I wholeheartedly recommend Bohan Chen for admission to your doctoral program at your school. He is an exceptional student with a deep passion for research, strong analytical skills, and a strong work ethic, and I firmly believe that he will become an excellent researcher in the future. If you have any further questions about his qualifications or background, please do not hesitate to contact me."}