In the real world, there were often many complicated situations and unpredictable changes. What was described in books was often simplified and summarized these situations and laws. In addition, there may be differences between the knowledge in books and the experience and situation in reality. Because people's environments, conditions, and experiences are different, reality is often more complicated and diverse than books. In the real world, people often have to face all kinds of challenges and difficulties, including material and spiritual pressure. What is described in books is often an idealized state without real practical experience. Therefore, in the real world, we need to constantly improve our abilities and skills through practice and experience to adapt to the changing environment and needs. Reality was often crueler than books because it often involved important aspects such as people's lives and health, as well as family and interpersonal relationships. Therefore, we need to be more cautious and responsible in the face of various challenges and risks in real life. At the same time, we need to maintain an optimistic and positive attitude and continue to learn and grow to meet future challenges.