Is it important to apply for a Ph.D. in North America, ranking or average score?

Professional ranking is the most important for studying and studying in the United States. Whether you are looking for a job or going to graduate school in the United States, you must consider whether there are famous professors in this school. However, if your grades and soft conditions are not enough, and you especially want to study in the United States, you don't have to consider the professional ranking too much. The school is in a good location, offering full prizes, and it is also very good.