The tree and the travellers
Once, there was a huge tree right in the middle of a dry land. The tree gave rest and shade (树荫) to hundreds and thousands of travellers. Being located near four towns and many villages, the tree was a perfect meeting place for travellers.

One day, two travellers reached the tree after a long time of walking. Their destination(目的地) was one of the towns nearby. It was a hot and sunny day, and the travellers were very happy to take a rest under the tree. Tired, they slept under the tree for a while, enjoying the cool shade and the soft breeze(微风).
After a while, one of the travellers got hungry. They had no food with them. The hungry traveller looked up at the tree to see if there was any fruit. Finding none, he began to curse(咒骂) the tree. “Oh, this is just a useless tree and it has nothing to feed (给……食物) us, not even a fruit or even nuts! It is of no use!”
The other traveller comforted him and asked him to stay cool. However, the hungry man continued cursing the tree.
The tree, which could not stand the cursing words of the traveller, said in a sad yet strong voice, “You can’t be so ungrateful(忘恩负义的) to me. Just think of yourself when you reached here in the hot and dry sun! I offered you a cool and comfortable place to rest and sleep with a soft breeze. I saved you from the hot sun, but you curse me!”
The traveller realized his mistake and said sorry to the tree.
理解
1. Why did the hungry traveller curse the tree?

2. What do you learn from the story?