最佳答案美国留学，学生们一般都会选择参考USNews排名。学生申请博士学位时，通常和硕士一样，参照专业排名。
1 CaliforniaInstitute of Technology
1 MassachusettsInstitute of Technology
1 University of California—Berkeley
4 Harvard University
4 Stanford University
6 University of Illinois—Urbana-Champaign
7 Northwestern University
7 Scripps Research Institute
9 University of Wisconsin—Madison
10 ColumbiaUniversity
10 Cornell University
12 Yale University
12 University of Chicago
12 University of Texas—Austin
15 PrincetonUniversity
15 University of California—LosAngeles
15 University of Michigan—Ann Arbor
15 University of North Carolina—ChapelHill
19 Texas A & M University
19 University of Pennsylvania
21 Pennsylvania State University—UniversityPark
21 Purdue University—WestLafayette
21 University of California—San Diego
24 Georgia Institute ofTechnology
24 Indiana University—Bloomington
24 Johns Hopkins University
24 University of California—Irvine
24 University of Colorado—Boulder
24 University of Minnesota—TwinCities
24 University of Washington