A．回顾往事；事后看来
B．符合；与……一致 C．响应 D．数量级
E．就……而言 F．为……铺平了道路；为……奠定基础 G．有一点；有一丝
H．提出；解释 I．提出假设；猜想 J．更不必说 In response to physical activities, the body
must adjust its blood flow in order to deliver nutrients such as oxygen and
glucose to stressed tissues and allow them to function.