The EU meeting comes a day after President Nicolas Sarkozy of France, which holds the rotating EU presidency, secured agreement by both Russian and Georgian leaders to abide by a cease-fire after several days of fighting in the breakaway region of South Ossetia and elsewhere in Georgia.

男性，64岁，吸烟史40年，近半年来咳嗽，痰中带血丝，近三个月出现声音嘶哑，查体：右锁骨上窝触及一约2cm×2cm之肿大淋巴结，质硬，无压痛。

为进一步检查，患者所应做的最常规且有价值的初步检查是（）

A.X线胸片

B.喉镜检查

C.血ADA

D.结核菌素试验

E.血常规