護理師照護一位局部感染的病人。下列哪項檢驗結果支持此診斷？
A nurse is caring for a client with a localized infection. Which laboratory finding supports this?
- ADecreased hemoglobin血紅素降低
- BDecreased creatinine肌酸酐降低
- CIncreased platelet count血小板計數增加
- DIncreased white blood cell count✓ 正解白血球計數增加
當身體面臨局部感染時，免疫系統啟動發炎反應，刺激骨髓釋放更多白血球（White Blood Cell, WBC）進入血液循環以對抗病原體。白血球計數升高（白血球增多症，Leukocytosis）是評估急性感染的重要臨床指標。護理師應評估病人的全身性反應，如體溫、發炎部位的紅腫熱痛，並觀察是否有膿性分泌物。臨床思路應聚焦於感染指標與全身性發炎反應症候群（SIRS）的早期識別。
When the body encounters a localized infection, the immune system initiates an inflammatory response that stimulates the bone marrow to release additional white blood cells (WBCs) into the circulation to fight the pathogen. An elevated WBC count (leukocytosis) is an important clinical indicator for evaluating acute infection. The nurse should assess the client's systemic response, such as body temperature, redness, swelling, heat, and pain at the inflammatory site, and observe for purulent drainage. Clinical reasoning should focus on infection markers and the early recognition of systemic inflammatory response syndrome (SIRS).