最值问题一直是高考中的热点问题,因变量多,结构复杂常导致处理难度大,但如果我们能抓住结构特征,善于归纳总结,将会事半功倍. The most valuable issue has always been the hot issue in the college entrance examination. Due to the large number of variables and the complex structure, it often leads to great difficulty in handling. However, if we can grasp the structural features and are good at summing up, we will do more with less.