未曾老师，用这个方法发现一个问题，数字文物库的碎片第一行和第一列尺寸为255，其它都是256，所以会出现两条细线，这个可以怎么解决呢？
YAML如下：
url_template: "https://shuziwenwu-1256350439.cos.ap-beijing.myqcloud.com/relic/189f8d0ea3914cd6a2b62479c98bee9c/image-bundle/16/{{x/256}}_{{y/256}}.jpg"
variables:
- name: x
from: 0
to: 47887 # Image width, taken from stage 1
step: 256 # Tile width, taken from stage 1
- name: y
from: 0
to: 2077 # Image height
step: 256 # Tile height
