参考以下CIC链接，任何CIC的网站都说以这个为操作准则的。 因为你父母是合法身份进入美国，属于第一条的情况，所以既可以在洛杉矶，也可以在国籍所在地办理。我不知道你在哪里看到Visitor需要回国办理。 http://www.cic.gc.ca/english/resources/manuals/op/op11-eng.pdf
Page 5, Section 5.11
5.11. Place of application for a temporary resident visa, study permit, work permit –
Implementation of R11(2)
Since April 1, 2005, applicants are required to submit their application for a temporary resident
visa, study permit or work permit to the visa office that is responsible for serving
• the country in which the applicant has been lawfully admitted; or
• the applicant's country of nationality, or, if the applicant is stateless, their country of habitual residence.