三十六岁女性，20天出现右股骨上端疼痛，查体：右股骨上端肿胀、压痛，右髋关节活动受限，X线片示右股骨颈及转子下溶骨性骨破坏，3年前患乳癌，施乳癌根治术，局部无复发。

最可能的诊断是()

A．骨肉瘤

B．软骨肉瘤

C．纤维肉瘤

D．乳癌骨转移

E．骨巨细胞瘤

WLANs are increasingly popular because they enable cost-effective connections amongpeople, applications and data that were not possible, or not cost-effective, in the past.For example, WLAN-based applications can enable fine-grained management of supply and distribution ___24___ to improve their efficiency and reduce ___25___. WLANs can also enable entirely new business processes. To cite but one example, hospitals are using WLAN-enabled point-of-care applications to reduce errors and improve overall ___26___ care.WLAN management solutions provide a variety of other benefits that can be substantial but difficult to measure. For example, they can protect corporate data by preventing ___27___ through rogue access points. They help control salary costs, by allowing IT staffs to manage larger networks without adding staff. And they can improve overall network management by integrating with customers’ existing systems, such as OpenView. Fortunately, it isn’t necessary to measure these benefits to justify investing in WLAN management solutions, which can quickly pay for themselves simply by minimizing time-consuming ___28___ and administrative chores.

26（）

A.finance 

B.patient 

C.affair 

D.doctor