One morning, Rulan woke up and found that there was only one guest in the soybean milk shop. The guest finished drinking soybean milk and left. Rulan turned to look at another soybean milk shop full of guests, and there was a large group of people waiting.

By twelve o'clock in the morning, no second guest came into the store. Father simply had to close the shop door, and three people sat down. "Strange, my father's fried dough sticks, barbecue cakes and soybean milk are all first-class, which are very suitable for office workers. I can't stop at noon every day. What is the reason? " Rulan observed the soybean milk shop for a while. I found that the soybean milk shop was dirty and messy, full of sundries, so the tableware was stained with dirt, the tables and chairs were old, and the ground was dirty and black, giving people a very unclean feeling. Ru Lan told her parents about the situation and helped them solve the problem together. Soon, the lost guests returned one after another.

This story tells us: when encountering problems, we should take the initiative to think, just like a doctor treating a patient, we should first understand the condition and then solve the problem with the right medicine. When we encounter difficulties in our study, we should also think seriously and observe carefully like Lan.