如何引导学生真正跳出题海,让学生的学习更有效率,这是教师必须尽心尽力去思考的一大课题.著名数学家波利亚曾说:“一个专心的、认真备课的老师能够拿出一个有意义但又不太复杂的题目,去帮助学生发掘问题的各个方面,使得通过这道题,就好像一道门,把学生引入一个完整的理论领域.”笔者结合课本“阅读与思考”中的一个问题,引导学生进行了一次探究之旅.现整理成文,就教于读者. How to guide students to jump out of the sea and make students’ learning more efficient is a big topic that teachers must try their best to think about. The famous mathematician Polya once said: “A concentrating, serious preparation teacher can take Develop a meaningful but not too complex topic to help students explore various aspects of the problem, so that through this question, it is like a door to introduce students into a complete theoretical field.”The author combines textbooks" with Think of a question in the book that guides students through a journey of inquiry. Now they are organized and taught to readers.