测量骶耻外径的标志点是指（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25957' and id < 2177007 and id<>'2177007' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25957' and id > 2177007 and id<>'2177007' order by id asc limit 5