“元有天下，薄海内外，人迹所及，皆置驿传，使驿往来，如行国中。”这句话说明了（    ）

下列关于显微镜的说法正确的是（  ）

When I was young，my father told me that little acts of kindness may give one great happiness. Since then I have always tried to help people in1.
One hot summer afternoon, I was2down the highway to New York when another car suddenly3into my lane(车道). My car was in the far right lane，so it ran onto the roadside. As a(n) 4driver，I moved my car quickly and skillfully back onto the highway without causing any accident.
I was5with that driver，but I thought that he just did not pay attention to the lane change, and he 6did not do that on purpose(故意).The car ran away7after cutting me off. Very soon it disappeared from sight. After a while，I came around a curve(弯道) and found the8car. The driver was walking along the roadside. He was an elderly man and looked9. With no telephone nearby and the nearest services twenty miles away. I decided to 10and see what the problem was.
The man’s car had a flat tire(瘪胎). Although he had a spare tire，he had nothing to work with. I decided to11him. I changed the tire for him and allowed him to sit in my Air-conditioned car while I did it. Fifteen minutes later，I12the work. I was hot and tired，but I really felt13after an act of kindness to the man who had earlier14my car ran off the road.
You can really enjoy great15from kindness acts, so always lend your hands to others in trouble.