Yang responds that the top priority is to be non-destructive and non-invasive, and X-ray photography and ultraviolet light provide an indispensable "third eye," much like the CAT scans that surgeons would find it hard to do without.
楊源泉說，檢測是以「非破壞性」、「低介入性」為主要考量，且 X 光攝影和紫外線燈的照射，是修護者不可或缺的「第三隻眼」，就像醫生不靠斷層掃瞄很難動刀一樣，一時還難以被取代。