快速心房颤动的患者，在用洋地黄治疗过程中，心率变慢而整齐，最好的处理是A．停用洋地黄

男性，32岁。因左侧阴囊肿大伴尿频4个月入院。入院后查体：左侧阴囊肿大，有波动感，透光试验阳性，左侧睾丸大小正常，左侧附睾肿大，表面不光滑，与阴囊皮肤粘连，左侧输精管增粗，表面可扪及串珠样改变，轻度压痛。血常规及肾功能检查正常，尿常规提示：WBC++，RBC+。

对该患者的最佳首选治疗方式为（）

A.立即手术治疗

B.阴囊热敷

C.阴囊穿刺抽液

D.全身抗结核治疗

E.严密观察

F.抗生素治疗

转向灯及危险报警灯闪光频率应为（）Hz。

A.2±O.5 

B.1±O.5 

C.1.5±0.5

目前最重要的治疗是()

A．镇静止痛

B．有效控制血压

C．强心利尿

D．继续静脉给予硝酸甘油

E．给氧

装饰用干花蕾

One state adds a 7 percent sales tax to the price of most products purchased within its jurisdiction. This tax, therefore, if viewed as tax on income, has the reverse effect of the federal income tax: the lower the income, the higher the annual percentage rate at which the income is taxed.
The conclusion above would be properly drawn if which of the following were assumed as a premise

A．The amount of money citizens spend on products subject to the state tax tends to be equal across income levels.

B．The federal income tax favors citizens with high incomes, whereas the state sales tax favors citizens with low incomes.

C．Citizens with low annual incomes can afford to pay a relatively higher percentage of their incomes in state sales tax, since their federal income tax is relatively low.

D．The lower a state’s, sales tax, the more it will tend to redistribute income from the more affluent citizens to the rest of society.

E．(E) Citizens who fail to earn federally taxable income are also exempt from the state sales tax.