I want to repeat what I once said : you will be a NIU_REN yourself when seeing a question , your head can come up with the similar questiones you have done before.
Recommend you to read again a articlel in XDF 's RC book ,which is about that how sucessful manager often come up with a solution using their experience and instinct .
So,pratice and summarize, questiones which takes on different forms will then be reduced to several typical ones
Speed really counts! High speed can not guarantee you get 100% correct answer, but at least you get most of them .
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