淋巴结增大变硬，外观呈苍白或灰白色，切面呈（）样为慢性增生性炎症。
参考答案：脂肪
Which of the following laboratory tests is considered the most reliable indicator of renal function
A. BUN.B. Urinalysis.C. Serum potassium.D. Serum creatinin
