当大脑半球出现半卵圆中心上部时，从扣带回顶部出现到中央旁小叶即将出现的1～2个断面，为顶枕沟消失的断面。
The parieto-occipital sulcus disappears on the 1-2 sections from the cingulate gyrus will disappear to the paracentral lobule will appear.
值得注意的是中央处两个大的小叶包含了小钙化灶。
Note that the two large lobules in the center contain microcalcifications.
对照组肝小叶结构和肝细胞状态正常，仅在中央静脉及汇管区可见少量胶原纤维。
In the control group, the structure of liver lobule was normal and a few of collagen fibers located in portal area and central vein.
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