Results: in Group a, damages to endothelial cells, vascular smooth muscles and the architecture of structures of veins were obvious, thrombosis appeared and finally resulted in venous obstruction.
结果：A组静脉血管内皮细胞、管壁平滑肌及构架结构均有明显损伤破坏，管腔内血栓形成，最终静脉闭锁。
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