例证题解法 — 英语填空题
题目
阅读下列段落：Biking to work improves employees' health. For example, Zhang Wei, an office worker, started cycling to his company last year and reported better sleep and more energy. The author mentions Zhang Wei's case mainly to ______ (用不超过10个英文单词概括作者引用该例的目的，如 to show/prove...).