婴幼儿斜颈最主要的体征是()
A.头颈偏向一侧,面部一侧大,一侧小
B.颈部淋巴结肿大
C.颈部活动受限
D.患侧胸锁乳突肌内可扪及肿块
E.X线片示颈椎畸形
He said that he would go to the central and western region _____ he graduated from Zhejiang University.[ ]
A. usually
B. frequently
C. immediately
D. constantly
皮内注射法的实施过程是什么?