患者女性，57岁，因"咳嗽、胸闷半月余，加重2天"入院。胸部CT示：右上肺叶外周带占位性病变，纵隔淋巴结肿大、增多，右侧中等量胸腔积液。胸水细胞学可见腺癌细胞。头颅MRI、腹部B超、骨ECT均未发现异常。

若患者PS评分为1，那么首选的治疗方式应当为（）。

A.手术

B.化疗

C.放疗

D.分子靶向治疗

E.最佳支持治疗

Lee Pickett, CFA. a well-known and respected analyst, follows the computer industry and does research about types of measurement scales. Pickett categorizes a group of stocks into quartiles based on historical rate of returns. Pickett's approach is most consistent with which type of the following measurement scales（）

A. Nominal.

B. Ratio.

C. Ordinal.