有关术前禁食，下列哪项是正确的（）

A.成人麻醉前禁食6～8小时

B.麻醉前1天午餐后开始禁食以使胃完全排空

C.对于孕妇麻醉前可以饮用清水（<150ml）

D.择期麻醉前24小时可不禁饮

E.幼小儿不用禁饮以避免哭闹

[配置路由器信息]
Current configuration：
!
hostname router1
isdn switch-type basic-net3 (1)
!
interface Ethernet0
ip address 10.0.0.1 255.255.255.0
ip nat inside (2)
!
interface bri 0
ip address negotiated (3)
ip nat outside
encapsulation PPP
PPP authentication pap callin (4)
PPP multlink (5)
dialer-group 1
dialer string 2633
PPP pap sent-username 263 password 263 (6)
ip route 0.0.0.0 0.0.0.0 bri 0
access-list 2 permit any (7)
dialer-list 1 protocol ip permit (8)
ip nat inside source list 2 interface bri 0 overload (9)
……
End