若腰穿檢查:腦壓310mmH2O,腦脊液微混,糖1.8mmol/L、氯化物98mmol/L,蛋白3.2g/L,白細(xì)胞2700×106/L,中性粒細(xì)胞94%,單核細(xì)胞2%,淋巴細(xì)胞2%。則最可能診斷為()