虽然由熟练的卫生工作者辅助的分娩比例在全球范围内有所上升，但在世卫组织非洲和东南亚区域，不到一半的人在分娩时获得熟练的协助。
While the global proportion of births attended by a skilled health worker has increased, in the WHO regions of Africa and South-East Asia fewer than half of all births had skilled assistance.
针对现有大区域范围路径规划算法存在的一些问题，提出一种限制搜索区域的多比例尺最优路径规划算法。
In allusion to some problems of existing route planning algorithm of large area, a multi-scale optimal route planning algorithm within restricted searching area was proposed.
针对现有大区域范围路径规划算法存在的一些问题，提出一种限制搜索区域的多比例尺最优路径规划算法。
In allusion to some problems of existing route planning algorithm of large area, a multi-scale optimal route planning algorithm within restricted searching area was proposed.
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