And yet : assuming a patient is healthy , meets all of the presurgical criteria and understands that there are risks , why is it people often are squeamish about seniors going under the knife ?

但是：如果病人是健康的，符合手术前的所有标准而且理解手术的风险，人们为什么会对那些将要动手术的老年人格外小心谨慎呢？

Interventional procedures that can be performed with sonographic guidance include but are not limited to cyst aspirations , presurgical needle hook wire localization , therapeutic procedures , and fine-needle , core , or vacuum-assisted biopsy .

介入可以在超声引导下进行的包括但不限于以下方面：囊肿穿刺，术前针钩线定位、治疗过程，细针、带芯或真空负压细针穿刺活检。