医患关系就是指医务人员与患者的关系。为什么？

A. Graceful restart allows session information recovery without disruption to the network.
B. A node can perform a graceful restart to help a neighbor recover its state. The label bindings are kepton state information， which helps the failed node recover faster and does notaffect the current for wardtraffic.
C. Graceful restart allows a node to recover state from its neighbor when there is no RP or before thedevice undergoes SS
D. Graceful restart does not allow session information recovery.
E. During a graceful restart， the router removes any stale prefixes after a timer for stale entries expire

A. 正确
B. 错误