Regions with many nearby points keep subdividing. Regions with few or no points stay large. The tree adapts to the data: dense areas get fine-grained cells, sparse areas stay coarse. The split grid is predetermined (always at midpoints), but the tree only refines cells that need it. Sparse regions stay as single large nodes while dense regions subdivide deeply.
其次是船小：4.78万吨的体量，在动不动十几万吨的巨无霸面前就是个“弟弟”。稍微有点风浪就晃，晕船药成了船上最抢手的东西。
，这一点在heLLoword翻译官方下载中也有详细论述
One Saturday, a 16-year-old hauled a heavy, three-foot tube into the middle of a large field in Wisconsin.
70E DSTREG - SLCTR TST_SEL_LLVV PTSELA DLY ; fire protection test on selector