The weather in London is so changeable that peoplealways take their umbrellas with them______rain.     [ ]

A. for fear of                  

B. in need of    

C. in spite of                  

D. because of

“同病异治”的实质是

A．证同治异

B．证异治异

C．病同治异

D．证异治同

E．病同治同