They also get a double benefit, because their interaction is two-way.
他们也得到双倍的收益，因为他们的交流是双向的。
But for those who had undergone surgery, the double treatment had no added benefit.
但对于接受过手术的患者，两种治疗方法并没有带来获益。
But for those who had undergone surgery, the double treatment had no added benefit.
但对于接受过手术的患者，两种治疗方法并没有带来获益。
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