One bag, that’s it.

The importance of packing light cannot be overemphasized(过度强调). Limit yourself to 20 pounds in a carry-on bag. A 9’× 22’ ×14’ bag fits under most airplane seats. And after you enjoy that sweet mobility and freedom, you’ll never go any other way.
You’ll walk with your luggage(行李) more than you think you will. Before leaving home, give yourself a test. Pack up completely, and practice being a tourist for an hour. Fully loaded, you should enjoy window-shopping. If you can’t, go home and thin things out.
Packing light isn’t just about the trip over and back—it’s about your traveling lifestyle. Too much luggage marks you as a typical tourist. It slams the back door shut. Changing locations becomes an important operation. With only one bag, you’re mobile and in control. Take this piece of advice seriously. Pack light, and pack smart. These days, you can’t bring anything possibly dangerous—such as knives, lighters or large amounts of liquid (液体)—in your bag.
What to bring?
How do you fit a whole trip’s worth of luggage into a small backpack or suitcase(衣箱)? The answer is simple: bring very little.
Bring out everything you think you might need on the floor. Pick up one item(件) at a time and check it. Ask yourself—not “Will I use it?”, but—“Will I use it enough to feel good about carrying it all the way? The world is getting really small—you can buy Colgate toothpaste, Nivea cream and Gillette razors in almost every country.
Think about what you can do without—not what will be convenient on your trip. When in doubt, leave it out.
【小题1】What do the last two paragraphs mainly talk about?

What do you want to be when you grow up? A teacher? A doctor? How about an ice-cream taster?
Yes, there really is a job where you can get paid to taste ice cream. Just ask John Harrison, an “Official Taste Tester” for the past 2l years. Harrison’s job has been responsible for approving（批准）large numbers of the sweet ice cream – as well as for developing over 15 flavors（味道）.
Some people think that it would be easy to do this job; after all, you just have to like ice cream, right? No – there’s more to the job than that, says Harrison, who has a degree in chemistry. He points out that a dairy or food-science degree would be very useful to someone wanting a job in this “cool field”.
In a typical morning on the job, Harrison tastes and grades 60 ice-cream samples. He lets the ice cream warm up to about 12^oF. Harrison explains, “You get more flavor from warmer ice cream, which is why some kids like to stir it, creating ice-cream soup.”
While the ice cream warms up, Harrison looks over the samples and grades each one on its appearance. “Tasting begins with the eyes,” he explains. He checks to see if the ice cream is attractive and asks himself, “Does the product have the colour expected from that flavor?” Next it’s time to taste!
Continuing to think up new ideas, try out new flavors and test samples from so many kinds of ice cream each day keeps Harrison busy but happy – working at one cool job.
【小题1】What is John Harrison’s job?