[填空题]
Most people who travel long distances complain of jetlag.
Jetlag makes business travelers less productive and more prone (51)
making mistakes. It is actually caused by (52)
of your "body clock"—a small cluster of brain cells that controls the
timing of biological (53) .The body clock is designed for
a (54) rhythm of daylight and darkness, so that it is thrown
out of balance when i (55) daylight and darkness at the
"wrong’’ times in a new time zone. The (56) of jetlag often
persist for days (57) the internal body clock slowly adjusts
to the new time zone. Now a new anti-jetlag system is (58)
that is based on proven (59) pioneering scientific
research. Dr. Martin Moore-Ede has (60) a practical
strategy to adjust the body clock much sooner to the new time zone (61)
controlled exposure to bright light. The time zone shift is easy to
accomplish and eliminates (62) of
