Lack of iron
Sometimes
sometimes it can depends on how healthy you are
Consult with your doctor. Medicine can sometimes be appropriate, and sometimes there are other options. Only your doctor can judge this.
This and that gets done, but sometimes with mistakes, accidents or misunderstandings.
It probably means that he has an interest in you or he wants to be friends with you.
Decisions in a time of war sometimes have to be made quickly.
Sometimes you never will know and sometimes you have thought that he/she might be and sometimes those thoughts could be wrong. Do not focus on this too much because you will drive them away. If you suspect then investigate and when the stories do not match then you will know. If they are drop the relationship quickly and move on.
Sometimes the site may be down, but it gets back up quickly.
Tornadoes can strike quickly and sometimes without warning.
maybe the vehicle is old and slow and does not come out of gear quickly
Clouds move fast sometimes due to strong winds in the upper atmosphere. These winds can push the clouds along quickly, causing them to move rapidly across the sky.
Sometimes Autistic children (identity-first language) can learn quickly, sometimes not.Generally speaking if an Autistic child is very interested in a subject it becomes their 'special interest' and they can learn about that subject very quickly and in great depth. If an autistic child is not interested in a subject and/or has learning difficulties it can be hard for them to learn at all.