A study published in the New England Journal of Medicine estimated that there are an average of 30 in-flight medical emergencies on U.S. flights every day. Most of them are not grave; fainting, dizziness and hyperventilation (换气过度) are the most frequent complaints. But 13% of them—roughly four a day—are serious enough to require a pilot to change course. The most common of the serious emergencies include heart trouble (46%), strokes and other neurological problems (18%), and difficult breathing (6%).
Let’s face it: plane riders are stressful. For starters, cabin pressures at high altitudes are set at roughly what they would be if you lived at 5,000 to 8,000 feet above sea level. Most people can tolerate these pressures pretty easily, but passengers with heart disease may experience chest pains as a result of the reduced amount of oxygen flowing through their blood. Low pressure can also cause the air in body cavities to expand—as much as 3
A. 13%
B. 46%
C. 18%
D. 6%
A study published in the New England Journal of Medicine estimated that there are an average of 30 in-flight medical emergencies on U.S. flights every day. Most of them are not grave; fainting, dizziness and hyperventilation (换气过度) are the most frequent complaints. But 13% of them—roughly four a day—are serious enough to require a pilot to change course. The most common of the serious emergencies include heart trouble (46%), strokes and other neurological problems (18%), and difficult breathing (6%).
Let’s face it: plane riders are stressful. For starters, cabin pressures at high altitudes are set at roughly what they would be if you lived at 5,000 to 8,000 feet above sea level. Most people can tolerate these pressures pretty easily, but passengers with heart disease may experience chest pains as a result of the reduced amount of oxygen flowing through their blood. Low pressure can also cause the air in body cavities to expand—as much as 3
A. heart attack
B. chest pain
C. stomach cramping
D. difficult breathing
A new study from the New Internet & American Life Project has found that 73 percent of US teenagers aged between 12 and 17, use the Internet. Most of these teens say being online has improved their relationship with friends and helped them make new friends.
The top five online activities for teens are: e-mail, surfing for fun, visiting entertainment sites, using instant messaging (IM) and researching hobbies.
About 13 million teens, or 74 percent of all online teens, use instant messaging. Only 44 percent of online adults use IM. Nineteen percent of teen IM users say IM is now the main way they communicate with their friends. Fifty-five percent of parents with online teens say learning how to use the Internet is essential for their children’s future success, while a further 40 percent say it is important. Just over 60 percent of parents say they have rules about Internet use, and the same proportion check to see what sites their children visit. Forty-fiv
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