[/size] [/size] [/size] [/size] 说明：用于确定头部经穴的纵向距离 [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size]