Thomas Knoll’s Algorithm
每轮遍历后，最大元素会"冒泡"到末尾
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`@receiver isNil ifTrue: `@nilBlock -> `@receiver ifNil: `@nilBlockIn fact, both versions work—but they apply different filters to the target node. Try to remember which one.。关于这个话题，WPS官方版本下载提供了深入分析
The spots fill up with fluid and become blisters before crusting over to form scabs, which eventually drop off and clear up.