对于子宫内膜异位症的治疗，以下哪项恰当（）

A.需要保留生育功能的年轻患者可以行半根治术

B.根治术是指全子宫切除

C.口服达那唑是假孕治疗的一种

D.保守手术是保留部分内膜异位病灶

E.妊娠可以缓解子宫内膜异位症

Most computer systems are (165) to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be (166) to an outsider attack by preventing (167) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (168) users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually (169) by tools referred to as Intrusion Detection Systems.

A．power

B．rights

C．authorized

D．common