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水流因边界的改变而引起断面速分布发生急骤的变化产生的局部阻力而引起的水头损失，称为（），用hj表示。

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Company.com network consists of a single Active Directory domain named Company.com.Company.com has an Exchange Server 2010 organization.The Company.com employees use Microsoft Office Outlook to connect to their mailboxes.A Company.com employee named Rory Allen complains that he is unable to send encrypted e-mail messages to an external recipient client.Furthermore， both of these users use e-mail encryption certificates.Rory Allen needs to send encrypted e-mail messages to the external recipient client.What should you do？（）

A. The best option is to inform Rory Allen to change the sensitivity settings of the e-mail message.
B. The best option is to inform the external recipient client to add a delegate.
C. The best option is to inform the external recipient client to send a signed e-mail message to Rory Allen.
D. The best option is to inform Rory Allen to send a signed e-mail message to the external recipient client.

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[A3/A4型题]女，72岁。1小时前不慎摔伤右髋部。查体：右下肢短缩，外旋50。畸形，右髋肿胀不明显，但有叩痛。该患者最容易出现的并发症是（）。

A. 脂肪栓塞
B. 坐骨神经损伤
C. 髋内翻畸形
D. 股骨头缺血性坏死
E. 异位骨化

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患者男，51岁。半天呕血4次，量约120ml，黑便2次，量约100g，伴头晕、心悸。入院时体格检查：血压80/60mmHg（10.6/8kPa），心率118次/min，意识淡漠，巩膜轻度黄染，腹部膨隆、软，肝未触及，脾肋下3cm，质中等，移动性浊音（+）。如立即行三腔二囊管压迫止血后，无继续出血表现，24h后的处理应（）

A. 继续持续压迫24h
B. 继续持续压迫至粪隐血试验转阴后，放气拔管
C. 气囊放气，留置三腔二囊管
D. 放气拔管，继续内科治疗
E. 放气拔管转外科手术治疗

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