64. 下列有關Rheumatoid arthritis (RA) 及Systemic lupus erythematosus (SLE) 兩種疾病所引起之胸水檢驗結果之敘述何者正確?
(A) RA及SLE胸水PH usually higher than 7.20
(B) RA胸水之LDH常大於700 units,但SLE胸水之LDH常小於500 units
(C) RA胸水glucose level常大於60mg/dl,而SLE glucose level常少於40 mg/dl
(D) 兩者之胸水complement與血清complement之比大於0.5