該患者入院后急查實驗室檢查結(jié)果:血常規(guī):WBC14.5×109/L,N87%。CSF:細胞數(shù)286×106/L,蛋白0.54g/L,糖3.5mmol/L,氯化物129mmol/L。下列哪項處理是正確的()