The old man was hurt so _______ that the doctor said it was hopeless for him to get better.
A:badly
B:exactly
C:widely
有学者认为:“实际上,全球意义上的世界历史直到哥伦布、达·伽马、麦哲伦等进行远航探险时才开始。”对“远航探险”的正确理解是( )