点<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/6615d89d0fa64837ab841fa2d26aada6.png?x-oss-process=image/sharpen,200"/>到直线<br/> <img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/809df21e8fb641cc844595d291056d38.png?x-oss-process=image/sharpen,200"/><br/> 的距离为（）