数学的解题方法有很多种,构造法就是其中的一种。它是在题目的条件和结论(答案)之间人为地构造出可以相互沟通的桥梁,在此基础上来解决问题的一种方法。利用这种方法解题的关键就在于构造一个合理、巧妙的中间数学模型。 There are many ways to solve problems in mathematics. The construction method is one of them. It is artificially constructed between the conditions and conclusions (answers) of the topic and can be used as a bridge to communicate with each other, based on which a method to solve the problem. The key to solving problems with this method is to construct a reasonable and ingenious intermediate mathematical model.