某些数学问题,若从全局着眼,从整体角度把握解题的方向与策略,常能化繁为简,化难为易.现以近几年竞赛题为例,举例说明如下: Some mathematics problems, if they focus on the overall situation, grasp the direction and strategy of problem solving from the overall perspective, often can simplify everything and make it difficult to make it easy. Now take the competition in recent years as an example, examples are as follows: