离境5个月，回学校不知道要不要签证？

我是生病休学了5个月，本来以为要签证，但是看见地里一个帖子说如果签证不过期，而且学校和项目是同样的，那就不需要签证，继续回去上学就行了。
我有点疑惑，真的不需要签证吗？我当然是不愿意签证的，以为好怕被check，这都快开学了。

Students - Returning to the United States from Travel Abroad. 1point 3acres 论坛
Students returning to the United States to resume their studies after an authorized temporary absence will not need to renew their visa, if the visa is still valid. The U.S. Department of State’s policy is that a student does not need to apply for a new F-1 visa if the student’s current visa is still valid, regardless of length of time outside the United States.

If the student took an authorized temporary absence of less than five months, their SEVIS record can be corrected to Active status when they are ready to return and re-enroll in school. Returning their record to Active will allow that student to re-enter the United States using their previous SEVIS ID number.

However, if a student has been out of the United States for more than five consecutive months (and not on study abroad), they will need to obtain a new Form I-20, “Certificate of Eligibility for Nonimmigrant Student Status,” and pay the I-901 SEVIS Fee again. Again, the student would only need to apply for a new visa if their original visa was no longer valid.