[单项选择] How can you tell the difference between a problem that will go away on its own and one that should be attended to as soon as possible Here are six symptoms that you should call your doctor about. 1. Persistent Headaches Everybody gets headaches now and then. If you’’ve had the same pattern of headaches for years, chances are that it’’s going to continue that way for years more. But if your headaches are so severe that you miss work or social gatherings, or if over-the-counter painkillers don’’t help, see your doctor. There are new treatments now that work well, even for disabling migraines (偏头痛). If you have an unfamiliar type of headache that’’s persisted for three days or longer and is associated with vomiting or visual changes, it could indicate an abnormality in or near the brain, such as a blood clot. If you have an unremitting (不间断的) headache on only one side of your head, near the temple or above the ear, it may be a condition called temporal arthritis (颞动脉炎)
A. Y
B. N
C. NG