Line segment tree structure in the tree structure, can carry out the operation of the single point queries, into a period of update.

说明：树结构中线段树结构，可以进行的操作单点查询，成段更新。

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It shows this equipment has simple structure and high measurement accuracy, the result on the seven segment LED is demonatrated by using the single-chip microcomputer to count the elements.

同时它还具有体积小、重量轻、噪声低、自扫描、工作速度快、测量精度高、寿命长等诸多优点，因此受到人们的高度重视，在精密?。

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