患者女性，38岁，持续性高血压180／120mmHg，无明显阵发性血压剧升现象，平时多尿，尤以夜尿为甚，多饮，四肢乏力，行动不便，曾疑尿路感染，服用多种抗生素、中药及一般降血压药无明显效果，类似情况已年余，入院检查：血常规正常，尿培养无细菌生长。血电解质：钾2.9mmol／L，钠148mmol／L，二氧化碳结合力38mmol／L，剩余碱+5mmol／L，血糖6．0mmol／L，尿素氮9.3mmol／L。B超：左肾上腺有1.6cm×1.5cm占位性病变，初步诊断为左肾上腺皮质肿瘤，拟行手术治疗。

此患者最可能的诊断是（）

A.肾上腺网状带皮质腺瘤

B.肾上腺束状带皮质腺瘤

C.肾上腺球状带皮质腺瘤

D.肾上腺髓质增生

E.肾上腺嗜铬细胞瘤

The kernel is the (66) of an operating system such as Windows98, Windows NT, Mac OS or Unix. The kernel provides basic services for the other parts of the operating system, (67) it possible for it to run several programs at once (multitasking), read and write files and connect to networks and peripherals. Applications and utility programs use the services provided by the kernel to provide practical business functionality.

In operating systems such as Windows or most versions of Unix, the kernel (68) everything except application and utility programs.

In microkernel operating systems such as Digital Unix and Apples forthcoming Mac OS Server, the kernel (69) supports only multitasking and memory management. Other services such as applications, utilities and the user interface support device drivers, API and graphics which all (70) outside the microkernel.

（66）处填（）。

A．nucleus

B．center

C．core

D．heart