中文字库搜索功能：一种针对可变长度关键字的引索结构，它的每一层不是靠整个关键字的值决定，而是由关键字的一个分量来确定，当然必须先满足关键字的分量在一个确定的范围内。如果要匹配某个字符串，只需要从树的根部逐层向下，搜索每一个字符是否有与之匹配的分量，能走到的最深的地方就是匹配到的最长前缀。-Chinese font search: A keyword for variable-length argument cable structure, it does not depend on each layer of the value of the entire keywords, but by a keyword to determine the quantity, of course, must first meet the keyword weight in a defined range. If you want to match a string, just from the tree root layers down, search for each character whether there are matching the amount that can come to the most is the longest prefix match.