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<DIV>Dear Sir or Madam:</DIV>
<DIV> I am a senior student in China. I have set
up a tree-like structure,and I want some content cached in leafNode without any
request while others cached with requests? But how and where can i
do this?</DIV>
<DIV> Looking for your help, thanks. </DIV>
<DIV> </DIV>
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<DIV align=left>2017-05-01</DIV>
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