This question tests the understanding of the primary role of physicians as suggested by the knowledge point 'physicians can achievewith theirhandslalone'. The phrase 'with their hands alone' implies that the primary role of physicians, in this context, is to achieve results through manual skills or direct intervention, without the reliance on advanced technology or external tools. Therefore, the correct answer is B. The other options, while roles that physicians may fulfill, do not directly relate to the specific emphasis on manual achievement highlighted in the knowledge point.