患者男性，30岁，因“3周前打篮球时摔伤膝部，膝前痛、肿胀，于劳累、上下楼、下蹲膝关节屈曲时加重”来诊。查体：体温36.8℃，脉搏80次/分，呼吸24次/分，血压115/70mmHg（1mmHg＝0.133kPa），髌骨内外侧及髌下压痛、饱满，膝关节伸直活动受限。舌红，苔白，脉弦细。X线片：无异常发现。MRI：髌下脂肪垫损伤。

宜选用的外敷中药药膏（又称敷药或软膏）是（）

A.金黄膏

B.三色敷药

C.舒筋活络药膏

D.活血散

E.生肌玉红膏

F.红油膏

For（）service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new（）for every packet sent. Instead, when a connection is established, a route from the（）machine to the destination machine is chosen as part of the connection setup and stored in tables inside the（）That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an（）telling which virtual circuit it belongs to.

the（）That route is used for all traffic flowing over the connection.

A．connections

B．resources

C．bridges

D．routers