写作。Writeaninstructionin60-80wordsaboutbloodpressture.Topic:bloodpressureDefinition:theforceofthebloodagainstarterialwallsImportance:oneofthevitalsignAffectingfactors:age,gender,stress,exercise,medications,temperature,sitesNormalrange:90-140/60-90mmHgMeasurement:sphygmomanometerandstethoscope