1. Express your interest and enthusiasm in this tutor's research field, indicating that when you choose a tutor, you have a deep understanding of this tutor's research field and projects, and you are full of enthusiasm for future research plans.

2. Explain your academic background and ability, including previous research experience, published papers, honors, etc. All these can prove their academic ability and comprehensive quality to some extent.

3. Emphasize the rigor and seriousness of academic research, express willingness to accept challenges and guidance, and strive to make progress in academic research.

Finally, you can re-emphasize your interest and enthusiasm in this tutor's research field, and express that you hope to have the opportunity to conduct research under the guidance of this tutor to achieve your academic goals.

In the reply, we should pay attention to expressing our sincerity and attitude, so that the tutor can feel his enthusiasm and pursuit of academics, as well as his interest and recognition of the tutor's research field. At the same time, you should also show your ability and strength, so that the tutor feels that you have the potential to be his excellent student.