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Text blocks should b笑站e constructed such that they 'hon麗為or and reveal' the relationships bet離現ween the various elements - headings麗到, subheadings, quotes, as這空ides and footnotes.弟船 Robert Bringhurst recomm美音ends a character coun草議t per line of approxim綠作ately 66 letters for optimum l笑些egibility, but accepts tha這司t anything between 45 a拍師nd 75 is satisfactory.