gastric bypass

例句：

1. 1. She underwent a gastric bypass to lose weight.
   她接受了胃旁路手术以减肥。
2. 2. The surgery is considered the most effective way to treat obesity.
   这种手术被认为是治疗肥胖最有效的方法。
3. 3. The patient's life expectancy has significantly improved after the gastric bypass.
   手术后，患者的预期寿命显著提高。