该方法将返回嵌套的单元格数据数组，其中每个单元格使用它的行坐标和列坐标进行索引。
This method returns a nested array of cell data, with each cell indexed by its row and column coordinates.
对于数据数组中的每一行，提取图像中的精确像素坐标。
For each line in the data array, extract the precise pixel coordinates in the image.
检查错误表就能够方便地查明源表行以及出问题的坐标。
Inspection of the error table conveniently reveals the source row as well as the problematic coordinate.
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