2. 腹水（ascites）病因之鑑別診斷有賴SAAG (Serum-Ascites Albumin Gradient)，下列有關SAAG之敘述何者正確？ (1)Nephrotic syndrome ＞ 1.1 g/dL (2)Tuberculous peritonitis ＜ 1.1 g/dL (3)Cirrhosis ＞ 1.1 g/dL (4)Peritoneal carcinomatosis ＜ 1.1 g/dL (5)Constrictive pericarditis ＜ 1.1 g/dL (A)(1)+(2)+(3) (B)(2)+(3)+(4) (C)(3)+(4)+(5) (D)(1)+(3)+(4) (E)(1)+(4)+(5)