相較之下，YouGov是「自願參加」的調查平台，人們自行報名以換取積分，積分可兌換現金。
Фото: Пелагия Тихонова / РИА Новости
。业内人士推荐夫子作为进阶阅读
Randomly selecting border points or using simple geometric divisions (squares/hexagons) results in too many border points per cluster (50-80). This leads to a shortcut explosion (N*(N-1)/2 shortcuts), making the files large and and calculations slow.
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