護理師正在照顧一位接受持續性肝素靜脈輸注的病人。該病人的活化部分凝血時間（aPTT）在治療範圍內。下列哪項評估發現對監測出血最重要？
A nurse is caring for a client receiving a continuous infusion of heparin. The client's activated partial thromboplastin time (aPTT) is within the therapeutic range. Which assessment finding is most important to monitor for bleeding?
- AClient's heart rate病人的心率
- BClient's body temperature病人的體溫
- CClient's respiratory rate病人的呼吸頻率
- DPresence of petechiae or ecchymosis✓ 正解出現瘀點或瘀斑
肝素（Heparin）治療期間，即使 aPTT 在治療範圍內，仍存在出血風險。護理師需進行系統性評估，皮膚出血徵象如紫斑（Petechiae）或瘀斑（Ecchymosis）是評估凝血功能異常的早期指標。相較於生命徵象（血壓、心跳），皮膚觀察能更早發現皮下出血。若發現異常，需立即通知醫師並檢查其他出血點（如牙齦、尿液）。
During heparin therapy, a bleeding risk remains even when the aPTT is within the therapeutic range. The nurse must perform a systematic assessment, and cutaneous signs of bleeding such as petechiae or ecchymosis are early indicators of abnormal coagulation. Compared with vital signs (blood pressure, heart rate), skin observation can detect subcutaneous bleeding earlier. If abnormalities are noted, the nurse should notify the physician immediately and check for other bleeding sites (such as gums or urine).