Attention Deficit Hyperactivity disorder, ADHD, is one of the most common mental disorders that develop in children.

注意缺陷多动症是儿童在成长中最常见的心理障碍之一。

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Sugar also causes hyperactivity, crankiness, and difficulty concentrating in children as any parent can attest to!

任何父母都能证明，糖能导致孩子过度活跃、偏执、注意力难集中。

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Children with attention deficit hyperactivity disorder exhibit a range of symptoms.

患有多动症的儿童会表现出一系列的症状。

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What undoubtedly benefits a small number of children with specific problems, such as hyperactivity, can all too easily become an instant, cheap cure-all for youngsters who may be misbehaving because they are bored, miserable, badly nourished or for any other reason.

ECONOMIST: Education: Behave, or else | The

The advice also stresses the need to make sure that children take medicine for conditions such as attention deficit hyperactivity disorder or for behavioural problems on the trip.

BBC: NEWS | Health | Homesickness 'can be prevented'

Many are concerned that Ritalin and similar drugs, which aid concentration in those with Attention Deficit Hyperactivity Disorder, are chemical straightjackets that prevent children from taking full responsibility for themselves.

FORBES: Ritalin 'Doesn't Turn ADHD Children Into Robots'