Loading Packages from Rscript

There was an explanation in the Rscript documentation.
https://stat.ethz.ch/R-manual/R-devel/library/utils/html/Rscript.html

Here are some excerpts.

Additional options accepted (before file or args) are

--default-packages=list
where list is a comma-separated list of packages names or NULL.Sets the environment variable R_DEFAULT_PACKAGES which determines the packages loaded on startup.The default for Rscript items methods as it takes about 60% of the startup time.

In summary,

• Adding options before R files and arguments you want to load
• Set the environment variable R_DEFAULT_PACKAGES to load at startup.

• If you boot with Rscript, what is the default (compared to booting with Rgui)?Note) 60% of the methods are omitted.

  Rscript--default-packages=util hoge.r

When booting with Rscript, the default (compared to booting with Rgui)?Note) 60% of the methods are omitted.

Rscript--default-packages=util hoge.r

It should be done in a way like this.