匈牙利著名数学家波利亚曾说过:“数学问题的解决仅仅只是一半,而更重要的是解题之后的回顾与反思.”何谓“解题反思”?就是当一道数学题解答完毕之后,去验证结论是否正确合理,去考察题目所提供的条件的应用是否完备,去检查论证过程是否有理有据、严密完善,去探索有无其他解法,去发现蕴含着哪些新的结论,等等. Polya, a famous Hungarian mathematician once said: “The solution to the problem of mathematics is only half, but more important is the retrospect and reflection after solving the problem.” “What is the problem?” Is a mathematical problem After the answer is completed, to verify the conclusions are correct and reasonable, to examine the conditions provided by the subject is complete, to check whether the justification of the argument process, rigorous and perfect, to explore whether there are other solutions to discover contains new conclusions ,and many more.