Dust down any blinds and other window treatments. Dust

down and wash window sills and corners. Wash the inside

and outsides of windows. Take down and rinse off screens,

before replacing.

除去百葉窗和其他窗戶配件的灰塵，把窗戶框和角落的灰塵除去後清洗，把窗戶裡外清洗一番，把紗窗拿下來換洗。

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window treatments

所指的不只是直接在窗戶玻璃上作霧化處理 (treatment) 等，根據 wikidictionary 解說，還包括窗戶相關的零零總總裝飾配件的總稱：

draperies, curtains 窗簾

valance 短幔；sheers 薄紗

tiebacks 繫帶

screens 紗窗

blinds, shutters, shades 百葉窗；活動遮板；捲廉 

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more example

Window treatments are curtains, blinds, shades or anything

else to cover the windows. Curtains are cloth, blinds can be

cloth, plastic or metal, and may hang vertically or horizontally. Good window treatments can really add a lot to a room.