这是我的ics文件：
BEGIN:VCALENDAR
VERSION:2.0
PRODID:https://www.google.com/
CALSCALE:GREGORIAN
TZ:+00
BEGIN:VEVENT
UID:https://www.google.com/
DTSTAMP:20180809T000000
DTSTART:20180809T113000
LOCATION:Doubletree by Hilton, Norwalk, CA
DTEND:20180809T133000
SUMMARY:State of the Nation
X-ALT-DESC;FMTTYPE=text/html:<!DOCTYPE HTML><HTML><BODY><p><img class="aligncenter size-full wp-image-9565" src="https://www.test.org/wp-content/uploads/state-of-the-nation.png" alt="" width="742" height="881"></p><br/><a href="https://www.test.org/event/state-of-the-nation/">Click here</a></BODY></HTML>
END:VEVENT
END:VCALENDAR
除图片外，所有内容均显示正确。我检查了Outlook 2013 2017，但图片网址正确且有图片，但描述中未出现图片。有人可以帮忙吗？