護理師正在檢視一位 24 個月大兒童的血鉛篩檢結果。根據公共衛生標準，哪種血鉛水平需要進一步介入？
A nurse is reviewing the results of a 24-month-old child's lead screening. Which blood lead level requires further intervention according to public health standards?
- A5 mcg/dL✓ 正解5 mcg/dL
- BLess than 1 mcg/dL小於 1 mcg/dL
- C1 mcg/dL1 mcg/dL
- D3 mcg/dL3 mcg/dL
血鉛（blood lead level）篩檢對於兒童健康至關重要，因為鉛暴露即使在低劑量下也可能對兒童的認知發展、行為和整體健康產生長期且不可逆的負面影響。由於兒童的身體對鉛的吸收率更高，且其神經系統仍在發育中，因此對鉛的毒性特別敏感。護理師在檢視篩檢結果時，必須了解美國疾病管制與預防中心（CDC）關於血鉛水平的參考值和介入標準。雖然目前認為沒有「安全」的血鉛水平，但公共衛生部門會設定一個閾值，超過此值就需要進行進一步的環境調查和醫療介入，以保護兒童免受持續的鉛暴露。
According to current CDC guidelines, a blood lead level of 5 mcg/dL or higher in children warrants public health intervention, including environmental investigation and monitoring. Although no level of lead exposure is considered safe, this threshold triggers specific protocols to identify and eliminate sources of lead. Levels below 5 mcg/dL generally do not require immediate intensive intervention but still necessitate awareness.
美國老舊房屋常有鉛漆問題，故血鉛篩檢是兒童保健重點；台灣則較關注水源與特定中藥材的鉛污染。