Most people who travel long distances complain of jet lag (时差). Jet lag makes business travelers less productive and more (36) to make mistakes. It is actually caused by (37) of your "body clock". The body clock is designed for a regular rhythm of daylight and darkness, so that it is thrown out of balance when it (38) daylight and darkness at the "wrong" times in a new time zone. The (39) of jet lag often persist for days while the internal body clock slowly adjusts to the new time zone. Now a new anti-jet lag system is (40) that is based on proven extensive pioneering scientific research. Dr Martin Moore Ede has devised a practical strategy to adjust the body clock much sooner to the new time zone through (41) exposure to bright light. The time zone shift is easy to accomplish and (42) most of the discomfort of jet lag. A successful time zone shift depends on knowing the exact time to either seek or avoid bright light. Exposure to light at the wrong time can (43) make jet lag worse. The proper schedule for light exposure depends a great deal on specific travel plans. Data on a specific flight itinerary (旅行路线) and the individual’s sleep pattern are used to produce a Trip Guide with (44) on exactly when to be exposed to bright light. When the Trip Guide calls for bright light you should spend time outdoors if possible. If it is dark outside, or the weather is bad, or you are on an aeroplane, you can use a special light device to provide the necessary light (45) for a range of activities such as reading, watching TV or working. A．controlled B．eliminates C．disruption D．excitement E．symptoms F．excludes G．actually H．prone I．instructions J．experiences K．rupture L．bound M．stimulus N．available O．scarcely