在英文的自我介绍作文结尾部分，你可以采用以下两个技巧来提升整体档次：
技巧一：并强调个人特点或目标
在结尾部分，你可以对全文进行简短的，并强调你的个人特点、技能或目标。这样的结尾可以让读者对你留下更深刻的印象，并记住你的自我介绍。例如：
“In conclusion, I am a passionate and determined individual who is always eager to learn and grow. My experience in project management and team leadership has equipped me with the skills to succeed in any environment. I am excited about the opportunity to contribute to your organization and achieve common goals.”
技巧二：表达感谢并展示积极态度
在结束自我介绍时，你可以表达感谢，并展示你的积极态度和对未来的期待。这样的结尾可以展示你的专业素养和人际关系能力，同时让读者感受到你的热情和动力。例如：
“Thank you for taking the time to learn about me. I am excited about the possibility of contributing to your team and look forward to the opportunity to demonstrate my skills and abilities. I am confident that I can make a positive impact and help achieve your organization’s goals.”