2. the first layer: books are a treasure house of knowledge ... endless happiness. Books bring people endless happiness.
Layer 2: Books are not just ... moving towards a bright future. Books are people's teachers and friends.
Connect the front with the bottom.
Our monitor not only studies well, but also helps others. (The answer is not unique)
When we are lonely, it will comfort us; When in doubt, it will give us the answer; When encountering setbacks, it will give us encouragement and strength; When we lose our way, it will lead us to a bright future.