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1·Columns (a) and (B) represent the two files to compare individually.

列和(b)列分别代表比较的两个文件。

2·Objective to compare the effects of transcatheter hepatic arterial chemoembolization (a arm) with hepatic and splenic arterial double embolization (b arm) on hepatoma complicated with cirrhosis.

目的比较肝动脉化疗栓塞(a组)和肝脾动脉双栓塞(B组)治疗肝癌并肝硬化病人的反应率、生存率、并发症和毒副作用。

3·Methods to retrospectively analyze the 100 patients' ECG (a group), and to compare with 100 normal persons' ECG (B group).

方法对100例毒蛇咬伤患者的心电图(A组)进行回顾性分析，与100例正常体检者的心电图(B组)对照。