男,54岁,反复脓血便半年,每天3~4次,在当地曾按"痢疾"治疗无明显效果。近一月出现腹胀,伴阵发性腹痛。查体:消瘦,腹稍胀,软,下腹轻压痛,右下腹可扪及一肿块,质较硬,尚可活动。此例首选的辅助检查()
A. 大便细菌培养
B. CT
C. 钡餐检查
D. 纤维结肠镜检查
E. B超
Due to a recent change in government regulations, Company.com needs to create two independent but synchronized copies of their data. These copies must be contained in separate storage device a minimum of 100 km apart. The customer has capacity in two systems that meet the criteria, one with SSA disk and the other is FAStT. What facility can be used to manage this issue?()
A. Two independent copies of the data can be created and synchronized using the "HACMP/XD:HAGeo"
B. The existing disks can be incorporated a single storage unit using the optional product "HACMP/XD:PPRC"
C. AIX can create a mirrored logical volume across the two systems that would be accessible from either system
D. AIX can use the multi path IO subsystem to spread the information across the devices and keep the copies separated