10年前进行的一项名为“全国肺气肿治疗试验”（National Emphysema Treatment Trial）的大型研究显示，与药物治疗相比，手术并未显现出会给病患在总体上带来更高的存活率。
In a large study a decade ago, called the National Emphysema Treatment Trial, the surgery didn't show an overall survival advantage over medical management.
10年前进行的一项名为“全国肺气肿治疗试验”（National Emphysema Treatment Trial）的大型研究显示，与药物治疗相比，手术并未显现出会给病患在总体上带来更高的存活率。
In a large study a decade ago, called the National Emphysema Treatment Trial, the surgery didn't show an overall survival advantage over medical management.
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