On February 9th, 2013, Sarah Darling was walking along the street when she met a homeless man named Billy Ray Harris. She reached into her change purse, emptied out all the coins she had and gave them to the homeless man. Neither of them realized that this small generous act would change their lives.

    Sarah didn't realize that she had given Billy not only all her change but also her diamond ring that she had put in her change purse earlier until the following morning. She and her husband, Bill Krejci, rushed to see if they could find Billy. The homeless man was not only in the same place, he also immediately returned the ring. The grateful couple paid him back for his honesty by emptying out their pockets of all the money they had.

    Bill Krejci, a web designer, felt that he needed to do something more for this amazingly honest man. So on February 18th, he set up a special page to raise money for him. In just four days, Billy received over $85,000 and there seems to be no end yet.

    That is not enough. Billy is living with a person who is generous instead of living in the streets. And that's not all—thanks to the news report, he got together again with his older brother, Edwin Harris, who he had been unable to find for 27 years.

    All the good luck is just because Billy did the right thing—returning something that did not belong to him.

阅读下面一则材料，从中你有什么发现？写出你探究的结果。  
        一只狼吃饱了，安逸地躺在草地上睡觉。另一只狼气喘吁吁地从远处跑来。这使躺着的狼十分惊奇，它问：“你在追赶羚羊吗？”
        “没有！” “有人在追赶你吗？”“没有！”“那你为什么没命地奔跑呢？”那只狼说：“听说狮子要来了。”
        “狮子要来？”听了这话，它放下心来，“狮子是我们的朋友，有什么可怕的呢？你去跑你的吧，我要睡觉了。”
        后来，狮子真的来了。由于它的到来，整个草原上的羚羊的奔跑速度变得极快，这只狼不再那么容易得到食物了，不久便饿死了。临死前它不住地怨恨，认为狮子破坏了自己平静的生活。
        探究结果：