1965 One morning, a thin little boy came to the library of a primary school in Seattle, USA. The librarian told him the classification method of books, and then asked him to put back the books that had been returned by the borrower but misplaced.

"Like being a policeman?" He asked. "Of course!" The administrator said.

Then, the little boy began to run before and after, shuttling between bookshelves. By noon, he had found three misplaced books and put them back.

The next day, he came earlier and worked harder. After a day's work, he formally asked to be allowed to be a librarian. Two weeks later, he told the administrator that he was moving and had to transfer. "Who will sort out the books that are' standing' in the wrong place after I leave?" The little boy is a little worried.

Not long after, he returned to the library and happily told the librarian that the library there wouldn't let him do it. His mother transferred him back to this school and his father picked him up every day. "If my father doesn't see me off, I'll go by myself." The little boy said. At that time, the librarian felt that a child who worked so hard and was so responsible would definitely become a big supervisor if he persisted.

Indeed, he is now in charge of a world-famous big company, that is, Microsoft in the United States, and this little boy is Bill Gates.

Q: What qualities does a little boy have?