去莱斯大学读博士很难吗？
PhD applications are very competitive， and the number of applicants greatly exceeds the number of spots available. In some cases， I have seen postdocs compete directly with students for slot - that should tell you how much competition there is. In most cases， a candidate will need to score above 70 on their GRE Subject Test in order to be considered for the PhD program (this requirement is especially stringent if one is from an outside country). The general GRE scores needed for admission are about 140 Verbal Reasoning/Analytical Writing and 135 Quantitative. A 4+1 undergraduate/graduate degree is also preferred， though not always required by all departments.
I would advise anyone who wants to go into a US PhD program to start working on any prerequisite coursework while still in undergrad， so that they can maximize their chances once it's time to apply. There needs to be a good balance between what you want to study（the research area）and where your strengths lie（which may mean taking additional classes）so that you don’t end up in a program that isn't the best fit professionally or personally. Your GPA will never look better than on your transcript， so take care in choosing your courses！
I wish everyone luck as they navigate this process！ It certainly was a life changing experience for me.