護理師觀察實習護生更換無菌敷料，哪項行為需要護理師介入阻止？
A nurse is observing a nursing student changing a sterile dressing. Which action by the student requires the nurse to intervene?
- AReaching over the sterile field to place a gauze✓ 正解跨越無菌區放置紗布
- BHolding the sterile object above waist level將無菌物品保持在腰部以上高度
- CTouching the edge of the sterile field with sterile gloves以無菌手套觸碰無菌區的邊緣
- DOpening the sterile package away from the body在遠離身體的位置打開無菌包裝
無菌技術（Sterile Technique）是預防外科傷口感染的關鍵。無菌區域一旦被污染，即視為無效。護理師在觀察實習護生操作時，需嚴格監控是否有任何動作導致無菌區暴露於未消毒的環境中。如「跨越（Reaching over）」無菌區，會因重力讓衣物上的微生物掉落，或因空氣擾動帶入污染，必須立即介入糾正。
Sterile technique is the key to preventing surgical wound infection. Once a sterile field has been contaminated, it must be considered invalid. When observing a student nurse performing a procedure, the nurse must rigorously watch for any actions that would expose the sterile field to a non-sterile environment. For example, reaching across the sterile field allows microorganisms from clothing to fall onto it via gravity, or causes airborne contamination through air disturbance, and must be corrected immediately.