IP multicasting is a set of technologies that enable efficient delivery of data to many locations on a network. Rather than making multiple copies of a message intended to be distributed to multiple recipients at the (71) of origin of a message, multicasting initially sends just one (72) and does not copy it to the individual recipients until it reaches the closest common point on the network, thereby (73) the bandwidth consumed. Network performance is significantly (74) because it isn’t bogged down with the processing and transmission of several large data fries; each receiving computer doesn’t have to (75) the transmitting server for the file.

A．loop

B．find

C．search

D．query

女，26岁，头晕，乏力8个月。体查：巩膜黄染，睑结膜苍白，淋巴结无肿大，脾左肋下1cm，肝未触及。Hb 58g/L，MCV 80fl，MCHC 27%，Tbil 66．69μmol/L(3．9mg/dl)，Ibil 58．14μmol/L(3．4mg/dl)，AST 40U/L，LDH 800U/L，最可能的诊断为

A．缺铁性贫血
B．慢性肝病引起的贫血
C．溶血性贫血
D．脾功能亢进引起贫血
E．再生障碍性贫血