An enterprise has plans to start adding IPv6 support. The initial deployment requires support from some IPv6 - only device s that need to access servers that support only IPv4. Which of the following tools would be most appropriate?（）
A. Native IPv6
B. Point - to -point tunnels
C. Multipoint tunnels
D. NAT - PT
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阴偏衰的病理特点是（）
A. 热、动、躁
B. 寒、静、湿
C. 温煦、兴奋功能减退
D. 宁静、滋润功能减退
E. 温煦、兴奋功能衰竭
女，30岁。既往月经正常，26岁时患胸膜炎，继而出现月经量明显减少，现闭经6个月。子宫输卵管碘油造影显示子宫腔狭窄，边缘呈锯齿状。该患者最可能的诊断是女，30岁半年前人流术后曾寒战、高热及下腹疼痛，给予抗感染治疗后好转。以后常出现下腹胀和腰骶部疼痛。妇科检查：子宫后倾后屈，正常大小，活动度差，压痛，子宫左侧片状增厚、压痛。该患者最可能的诊断是
A. 急性阑尾炎
B. 子宫内膜异位症
C. 慢性盆腔炎
D. 急性盆腔炎
E. 生殖器结核
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