The objective is to confine impact to places which already show use and avoid enlarging the area of disturbance.
这样做的目的是把对自然的影响限制在已经使用过的区域，避免扩大影响的区域。
2
Objective To investigate the effect of enlarging esophageal hiatus through central abdomen lengthened incisal opening in the proximal stomach cancer radical correction.
目的探讨经上腹正中延长切口扩大食管裂孔方法在近侧部胃癌根治术的应用效果。
3
Objective To discuss operative methods and treatment for long-segmental HD and secondary lengthen-enlarging-segmental common HD.