護理師為一名 2 歲幼兒進行發展評估，哪項發現應通知醫師？
A nurse is conducting a developmental screening for a 2-year-old child. Which finding should the nurse report to the physician as a potential concern?
- AUses two-word phrases使用兩個字的詞組
- BFollows simple instructions遵循簡單的指示
- CCannot walk up stairs alone✓ 正解無法獨自上下樓梯
- DPlays beside other children rather than with them在別的孩子旁邊玩耍而非與他們一起玩
2歲幼兒的發展評估重點在於大動作（Gross motor）、精細動作（Fine motor）、語言及社交能力。根據丹佛發展篩檢測驗（Denver Developmental Screening Test），2歲幼兒通常已具備獨自上下樓梯（需扶手）、跑跳、組成二至三字詞組、並能執行簡單指令的能力。無法行走樓梯暗示大動作發展遲緩，可能涉及神經肌肉或骨骼系統異常，必須及時轉介醫師進行詳細評估。護理師在評估時，應注意排除環境限制因素，確認是否確實為發展遲緩。
Developmental assessment of a 2-year-old focuses on gross motor, fine motor, language, and social skills. Per Denver Developmental Screening Test, 2-year-olds usually can walk up/down stairs alone (using handrail), run/jump, form 2-3 word phrases, and follow simple instructions. Inability to climb stairs suggests gross motor delay, possibly neuromuscular or skeletal pathology, requiring prompt physician referral. The nurse should rule out environmental constraints to confirm true delay.