（六）扰乱大型群众性活动秩序的其他行为。
buffer[i] = (uint8_t)[arr getIndex:i];
，这一点在爱思助手下载最新版本中也有详细论述
One in four properties at flood risk by 2050 - report
defaults.memory
We wanted a scenario where, say, 5 well-placed border points could efficiently represent an area with 5,000 internal points and 10,000 road edges. This would reduce those 10,000 edges to just 5*4/2 = 10 shortcuts for routing through that cluster at a high level – an incredible 1:1000 point ratio and a 30x reduction in edges to consider for the high-level path!