37-year-old teacher is hospitalized with complaints of weakness, incoordination, dizziness, and loss of balance. The diagnosis is multiple sclerosis (MS). Which of the following signs and symptoms, discovered during the history and physical assessment, is typical of MS

A. Diplopia, history of increased fatigue, and decreased or absent deep tendon reflexes.
B. Flexor spasm, clonus, and negative Babinski’s reflex.
C. Blurred vision, intention tremor, and urinary hesitancy.
D. Hyperactive abdominal reflexes and history of unsteady gait and episodic paresthesia in both legs.

教学中如何体现学生为本？