After years of study, I have known there are only two types of people in this world:those who get to the airport early and those who arrive as the plane is about to take off. If there were any justice in this world, the early-airport people would be rewarded for doing the right thing and the late-airport people would be punished. But the early-airport people get ulcers , heart attacks and bite their fingernails to the bone. The late-airport people are hardly aware that they are flying. A guy of that kind once said, "Don't hurry. If you miss your flight, it's because God didn't want you to go."This is clearly a guy who is never going to get an ulcer. Early-airport people suffer another"name". They are called exactly what they are--wimps . I know. I am an early-airport person for years. My luggage will get on the plane first, which makes it the last luggage they take off the plane after landing. Another strange thing:No matter how early I showed up, I was always told that someone had called two or three years ahead of me and asked for the best seat. I figured it was a trick. I figured there was someone in America who called every airline every day and said, "Is that wimp Simon flying somewhere today? If he is, give me his seat. " After a lifetime arguing with my wife over whether I really have to pack 24 hours in advance and set the alarm clock four hours ahead, I have learned another fact about early-airport people and late-airport people: They always marry each other. The purpose of writing the passage is to  _  .
give useful tips on taking a plane offer advice about catching a plane express the writer's anxiety about taking planes show people's two attitudes towards catching planes