Inattention and "hyperactive" behavior are not the only problems in children with ADHD.

注意力不良与“活跃过度”行为不是ADHD儿童的唯一问题。

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In one study, published in 2004, researchers found that a diet free of artificial colorings and the preservative sodium benzoate appeared to reduce hyperactive behavior among preschoolers.

CNN: FDA weighs food dye, hyperactivity link