對於心衰竭病人，下列哪項是評估體液狀況最可靠的指標？

心衰竭病人的體液滯留是病情惡化的主要指標。每日體重（Daily weight）是評估體液狀況最敏感、最客觀的數據。體重在短時間內的快速增加（如 24 小時內增加 1-2 公斤），通常代表體內水分滯留，而非脂肪堆積。相較於 I/O 紀錄（容易遺漏呼吸蒸發或流汗）或血壓（受多重因素干擾），體重是最直接的臨床指標。

Daily weight is the most sensitive and objective indicator of fluid balance in heart failure patients because it directly reflects changes in body water retention. Unlike intake and output records, which may miss insensible losses, or blood pressure, which is influenced by multiple factors, a rapid weight gain of 1 to 2 kg in 24 hours strongly suggests fluid overload rather than fat accumulation.