中共

Methods 91 patients with advanced esophagocadial cancer were divided into two groups: the control group (to receive PDT and local chemotherapy) and the test group (to receive endoscopic splender dilation plus PDT and local chemotherapy).

食管贲门癌患者91例，按治疗方法分为对照组和联合扩张治疗组（经内镜探条扩张联合PDT及局部化疗）。

The formal logic is the logic of affirmation. The dialectic logic is the logic of description.

形式逻辑是关于断定的逻辑，辩证逻辑是关于描述的逻辑。