1. From the world ranking, Harvard ranks first, and Oxford only ranks in the top ten.

2. Harvard ranks first in the United States, Oxford ranks first in the United Kingdom, and the education system is different! 4-year undergraduate course in the United States, 2-3 years graduate student, 3-year undergraduate course in the United Kingdom, 1 year graduate student.

3. The evaluation of institutions still depends on personal opinions and preferences, and the ranking can only be used as a reference.