From this passage, we learn that aspirin is usually used to treat _______.

A．take aspirin as much as we like
B．take aspirin with care
C．take aspirin without considering anything
D．take aspirin only considering the age

A．only students from China study at the top universities
B．no other students but Japanese and Chinese students study at the top universities
C．Chinese students often fight against Japanese students
D．famous universities in the United States attract more Chinese students