Students majoring in computer science can follow the following steps when choosing thesis topics:

1. Determine your research direction: First, you need to determine your own research direction. This can be any field of computer science, such as artificial intelligence, machine learning, network security, software engineering and so on. You can choose according to your own interests and the learning situation of professional courses.

2. Access to literature: After determining the research direction, you need to consult relevant literature to understand the latest research progress and existing problems in this field. This can help you find a research topic that interests you.

3. Ask research questions: In the process of consulting literature, you may find some unsolved problems or problems worthy of further study. You can take these questions as your research questions.

4. Determine the research method: After determining the research problem, you need to determine how to solve it. This may require you to learn new theoretical knowledge or use new technical tools.

5. Make a research plan: Finally, you need to make a detailed research plan, including your research objectives, research methods and expected results. This plan can help you keep clear thinking in the process of writing your thesis.

Generally speaking, students majoring in computer science need to combine their own interests and professional knowledge to determine a challenging and feasible research topic by consulting literature, asking research questions, determining research methods and making research plans.