单选题 A client is receiving an IV infusion of dextrose 5% in water and lactated Ringer's solution at 125 mL/hr to treat a fluid volume deficit. Which of these signs indicates a need for additional IV fluids?
A. Serum sodium level of 125 mEq/L.
B. Temperature of 99.6 °F(37.6℃).
C. Neck vein distention.
D. Dark amber urine.

【正确答案】 D

【答案解析】Normally, urine appears light yellow; dark amber urine is concentrated and, in this client, suggests continued fluid volume deficit. The serum sodium level normally ranges from 135 to 145 mEq/L. A temperature of 99.6°F is only slightly elevated and doesn't indicate fluid volume deficit. Neck vein distention is a sign of fluid volume overload.