Our subject is attention deficit disorder, ADD, and the related form ADHD, attention deficit hyperactivity disorder. These affect an estimated five to ten percent of children worldwide.
Children who forget easily and never seem to finish tasks or pay attention might be found to have ADD If, in addition, they seem overly active and unable to control their behavior, a doctor might say it is ADHD.
Experts say the cause involves a chemical imbalance in the brain. It can affect not only school, but also personal relationships and the ability to keep a job later in life. Many of those affected also have learning disabilities or suffer from depression.
Medicines can produce calmer, clearer thinking for periods of time. But the drugs can also have side effects like weight loss and sleep problems. And there is debate about the morality of medicating children.
Susan Smalley is a psychiatry professor at the University of California, Los Angeles. She just led
A. Overly active and unable to control their behavior.
B. Forget easily and never seem to finish task.
C. A chemical imbalance in the brain.
D. Learning disabilities.
Sleep Deficit(不足) Judging from recent surveys, most experts in sleep behavior agree that is virtually an epidemic of sleepiness in the nation. "I can’t think of a single study that hasn’t found Americans getting less sleep than they ought to. " says Dr. David. Even people who think they are sleeping enough would probably be better off with more rest. The beginning of our sleep-deficit crisis can be traced to the invention of the light bulb a century ago. From diary entries and other personal accounts from the 18th 19th centuries, sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night. "The best sleep habits once were forced on us, when we had nothing to do in the evening down on the farm, and it was dark. " By the 1950s and 1960s, A. the performance tests used in the study of sleep deficit B. special branches of knowledge that are being studied C. people whose behaviors or reactions are being studied D. the psychological consequences of sleep deficit [简答题]net income
[简答题]net discretionary incomes
[单项选择]Sharon does net enjoy
A. attending meetings. B. typing invoices. C. preparing price lists. [单项选择]第二篇
|