Because frequent use of over-the-counter pain relievers can set off a "rebound" effect, leading to more headaches, treatment should be discussed with a doctor.
因为频繁使用非处方镇痛剂会产生“反弹”效果，导致更多的头痛，因此这种治疗方法必须和一名医生商量。
The reason: It forces you to buy into depressed sectors that may be due for a rebound, while lightening up on highflying sectors that could be set to tumble.
原因在此：它迫使你买入有望反弹的受挫品种，同时减持那些必将下滑的当红品种。
The reason: It forces you to buy into depressed sectors that may be due for a rebound, while lightening up on highflying sectors that could be set to tumble.
原因在此：它迫使你买入有望反弹的受挫品种，同时减持那些必将下滑的当红品种。
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