叙述儿推拿揉五指节的操作手法。
参考答案：
五指节位于小儿掌背五指第1指间关节。手法：用拇、食指直接揉搓。
Lai Changxing _____ Canada with his family before the policemen began to catch him. [ ]
A. had been to
B. has gone to
C. would go to
D. had arrived in
发展的观点是唯物辩证法两大总特征之一，请将发展的观点做一个小结。
