how to understand the sentence of "it suits you to a T.?" I am confused about the letter "T", what does it mean?

A romantic love story but sad outcome It’s AM 12 o’clock,it’s time to get off duty, I follow the people stream to went out of office, and went down stairs to have my lunch,when I went to the gate,I saw a man take a bunch of flower standing there…the flower is fresh and beautiful,I thought the man is about 23 years old.and 165 centimetres tall,he was wear a green T-shirt,and black trousers. It’s very hot today,there is some sweat steamed out of his forehead.scince I was hurry to have my lunch,so I didn’t stay there to view the whole process.namely,I didn’t see the heroine. In lunch,all of my colleagues were imagine and discusse with this romantic love story.we thought the girl will be received the flower shyly,and give a hug to the man,then leave together to have lunch. We are regreting of that we did not know about the outcome,fortunately,I have detected some news.,can you guess what happened? Unexpected,in afternoon,when I finished my daily work,and walked on my way home,I found the flower threw in the rubbish bin messily.it was amazing me.i didn’t know that what unfortunate encounter of the man was suffered..maybe very awkward and embarrassed…

my rutine life and work...(please help me to correct the mistakes) Ringing…… it is 7:30 o’clock, My alarm is ringing and waked me up,but,I did not open my eyes.I stretched my arm and try to close the alarm,yeah!the ringing is stopped,I turned over and continue to sleep for one more minute.and then,I am absolutely cleared. I uncovered my quilt,and opened my eyes,I am sat on the bed for a while,then wearing my slipper,and squeeze some toothpaste on the toothbrush,then go to the washroom brush my teeth and wash my face. If I am a girl,maybe I will put on a bit of makeup,unfortunately,I am a man,of course,I will ignore this stage.i am wearing my uniform shirt,dress my private pants and shoes,according to my habit,I am drinking a cup of water in every morning.then,take my work card and meal card go down stairs to have my breakfast. In generally,I will have 2 bread and a cup of milk in every morning,if there is enough time,I will stay at the canteen to finish my breakfast,if no,I will wrap then and take them to my office.today,the time is hurry,i have to take the breakfast to my office. Holy shit,what a hot weather!I have heard the weather forecast,the temperature will reach to 38 degree centigrade today,it is very terrible.when I though this,I can not help but speed my walk to my office to enjoy the air condition.my office room is 405 on the fourth floor,I am go up stairs and reached on the fourth floor,then,turn right and go straight ahead about 100 metres,turn right,it’s my office. There are 2 colleagues there,I think they were earlier than me for a few minutes,the air condition was opened,it is cool and comfortable.I am sat on my seat of compartment,subsequent opened my computer and prepare to start my day work. There are some remain technic forms need me to fill out sent by customer yesterday… It is not the end,I will continue tomorrow….