单项选择题

It has been found that vitamin E______.

A．should be taken by patients regularly and persistently
B．can effectively reduce the recurrence of heart disease
C．has a preventive but not curative effect on heart disease
D．should be given to patients with heart disease as early as possible

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单项选择题

It can be seen that large doses of multivitamins______.

A．may bring about serious side effects
B．may help prevent excessive bleeding
C．are likely to induce the blockage of arteries
D．are advisable for those with vitamin deficiencies