白内障可以通过手术清除，但视网膜中间的损伤是无药可医的。
While cataracts can be removed surgically, there is no way to reverse damage to the macula, the area in the center of the retina.
他被诊断患有胰腺癌，虽然他的健康状况不稳定，但即使不通过手术治疗，也能设法存活数年。
He was diagnosed with prostate cancer but without surgery managed to survive several years, though his health was precarious.
通过手术减少腹部脂肪的做法有过动物和人体试验，但技术难度很高，近期不太可能成为减肥的方法。
Surgically removing visceral fat has been done on animals and some humans experimentally, but it is far more difficult and isn't likely to be a weight-loss option anytime soon.
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