在某资料上有人对2011年江苏高考题第13题给出了解法和推广,笔者对其解法有几点些疑问:(1)解法不清晰;(2)对学生或读者启示作用不明显.笔者认为研究数学问题应该在以下几点做文章:(1)解法简洁清晰要便于掌握基本知识运用;(2)总结经验方法要便于对读者或学生有启示作用;(3)能否改编或推广要便于思维上深挖掘.本文笔者对此题再次研究,希望对读者有所帮助及启示.题目设1≤a1≤a2≤…≤a7,其中 Some information on some of the 2011 Jiangsu college entrance examination questions 13th given solution and promotion, I have some doubts about the solution: (1) the solution is not clear; (2) the role of enlightenment for students or readers is not obvious. The author believes that the study of mathematical problems should be in the following articles: (1) the solution is simple and clear to grasp the use of basic knowledge; (2) summarize the experience and methods to facilitate readers or students have an enlightenment; (3) can adapt or promote To facilitate the thinking of deep mining.This article I study again on this issue, I hope to help readers and enlightenment. Subject set 1≤a1≤a2≤ ... ≤a7, in which