萬般皆下品?

從事書店工作，板主買多了書籍，多看了書本。
原因是有特價，培養了閱讀興趣，
還是為了工作關係，自己也弄不清楚。
不知從何時開始，開始喜歡同時看多本書籍。
不知道這種閱讀方式有沒有問題，但感覺沒深深鑽進書海。

最近正在看以下三本書︰
龍應台新著《天長地久》
中華新視野《三國志》
鄺兆昌的《二房客︰給生活的情書》

閱讀它們各有原因︰
因為她認識龍先生的書籍。
因為一個遊戲對三國起了興趣。
因為一位中學好友的介紹在多年前買了鄺兆昌的三本書。

前一兩天，Cengage Sales 跟我說比較喜歡龍應台的舊作。其實，小弟在圖書館也借了她大部分的作品來看。有人覺得她做了官後筆風有所轉變，但退下來時又有如何的變化呢? 我覺得她的寫作大致可分為議論文和抒情文兩種，本人比較喜歡她書寫的親情。她寫的兩岸歷史比較沉重，但正正填補了我對歷史的無知，儘管是少許的近代史。舊同事亦提醒我買新書前最好先讀頭一兩個篇章，不要只看簡介，否則就是盲從。可是，我都是在第一日公開發售時買了，買了才在巴士上看第一章，幸好沒失望。

只閱讀了《三國志》的魏書的大部分，曹操的確是一代奸雄。
曹操雖然不能大一統，但有他一定的成就，而本人認為要歸功於他的謀臣。
如果沒有譯文，中文基礎薄弱的我是不能讀懂大部分的文言文。

最後，這本《給生活的情書》的作者名氣不大。
但是，他的輕鬆小品頗有啟發性，值得我再一次重閱。

健康是福

人體各個器官運作正常，猶如一檯各個部件操作順暢的機械。
當一個人患病時，有時會有所抱怨，但有可能是因為不錫身。
常言道，健康不是必然的，我們要在健康的當下懂得感恩啊！

stock market

人常道︰
「發明股票的第一人是天才，
跟隨者一個比一個愚蠢。」

蛇行

蛇行，指的是蛇類生物在進行陸地移動時的主要方式。蛇類生物沒有足部，而是利用腹鱗及肌肉的縮放產生移動力。蛇的移動方式主要有四種，分別是蜿蜒式、側行式、直蠕式和風琴式。

zh.wikipedia.org

以純氧舒緩高山症的中毒情況

Breathing oxygen at higher than normal partial pressure, leading to hyperoxia, can cause oxygen toxicity or oxygen poisoning. The central nervous system, lungs, and eyes are the systems primarily affected...Prolonged exposure to above-normal oxygen partial pressures, or shorter exposures to very high partial pressures, can cause oxidative damage to cell membranes leading to the collapse of the alveoli in the lungs, retinal detachment and retrolental fibroplasia in the eye, and seizures.

ncbi.nlm.nih.gov

...The ‘wash-out’ of carbon dioxide progresses, from the lungs, and hence from the blood, and from the body tissues including, importantly, the brain. Carbon dioxide is a crucial variable in acid–base homeostasis; its reduction shifts the body fluids towards greater alkalinity (increased pH) and this has further knock-on effects. For one thing, it tends to cause constriction of some blood vessels, particularly those in the brain, reducing its blood supply and therefore its oxygen supply.

encyclopedia.com

Carbon dioxide (CO2) has a profound and reversible effect on cerebral blood flow, such that hypercapnia causes marked dilation of cerebral arteries and arterioles and increased blood flow, whereas hypocapnia causes constriction and decreased blood flow...Although several mechanisms involved in hypercapnic vasodilation have been proposed, the major mechanism appears to be related to a direct effect of extracellular H+ on vascular smooth muscle. This is supported by findings that neither bicarbonate ion nor changes in Pco2 alone affect cerebral artery diameter...

ncbi.nlm.nih.gov

緣木求魚

緣木，爬樹。爬到樹上去找魚。

baike.baidu.com

孕婦攝取葉酸的U型風險

懷孕吃葉酸，有助胎兒骨骼和神經系統發育，但原來孕婦葉酸水平過低或過高，都會增加嬰兒患自閉症的風險……不過婦產專科陳少慧醫生提醒，留意到有孕婦有時會誤服「藥用葉酸」，每日攝取量達5000微克的高濃度葉酸，即孕婦建議最高攝取量的3至5倍。

topick.hket.com

Folic acid is a B vitamin. It helps the body make healthy new cells. Everyone needs folic acid. For women who may get pregnant, it is really important. Getting enough folic acid before and during pregnancy can prevent major birth defects of her baby's brain or spine.

medlineplus.gov

解凍砧板

金屬砧板本身沒有溫度，也不需要插電。解凍板由高導熱鋁合金以及食品級特殊抗菌P.P.（聚丙烯）材料製成，內嵌高效能導熱管，通過吸收周圍環境中的熱量可實現13倍解凍速率。

kknews.cc

零運動女生

男人在街上看女人似乎是天性，本人也不例外。
肌膚雪白是很美麗，但是蒼白到一個點是不健康的。
Although melanin (黑色素) is produced to protect your skin from the sun, it cannot prevent burns on its own.(Webber, 2017)
瘦即是美?板主覺得有少少肉地才是最美。
(可能有人認為我在這裡評論女性，是不尊重女生。)
瘦屬病部，也是一種所謂的亞健康。
瘦削到一個點，出現皮包骨，已經接近厭食症，是一種精神問題。
Anorexia nervosa is an eating disorder characterized by an abnormally low body weight, an intense fear of gaining weight and a distorted perception of weight. (mayoclinic.org)

meteor

假如有一天，我抬頭向上望，有一顆流星劃破天際，會祝願她健康、快樂。
(Image: science.nasa.gov)

228

https://www.thenewslens.com/article/90245

SARS transmission

The transmission of SARS appears to occur predominantly by direct contact with infectious material, including dispersal of large respiratory droplets. However, it is also possible that SARS can be spread through the airborne route.

https://www.cdc.gov/sars/clinical/respirators.html

The bathroom floor drains with dried-up U-traps provided a pathway through which residents came into contact with small droplets containing viruses from the contaminated sewage. These droplets entered the bathroom floor drain through negative pressure generated by exhaust fans when the bathroom was being used with the door closed. Water vapor generated during a shower, and the moist conditions of the bathroom, could also have facilitated the formation of water droplets. The likelihood of exposure was enhanced by the small dimensions of the bathroom units (about 3.5 square meters). Virus-contaminated droplets could readily have been deposited on floor mats, towels, toiletries and other bathroom equipment.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC539564/

billion

British English has now adopted the American figure, though, so that a billion equals a thousand million in both varieties of English.

https://en.oxforddictionaries.com/explore/how-many-is-a-billion

Transport of sugar in plants

Phloem is composed of living cells that transport a water solution of sugars...This movement is modeled by the pressure-flow theory, a part of which is that the sugar-containing fluid is moved through sieve tubes by fluid pressure. By this means, nutrients can be moved from the photosynthetic site to the place where the sugar is being used whether it is up or down the stem of the plant.

Part of the pressure-flow theory is that the sucrose produced is moved by active transport into the companion cells of the phloem in leaf veins. This raises the concentration of sucrose molecules in the companion cells above that in the sieve tubes, so they can then move into the sieve tubes by diffusion. With the concentration of sucrose now greater in the sieve tubes than external to them, water molecules will move into the sieve tubes near those photosynthesis locations by osmosis. With a larger amount of water in the tube, its fluid pressure will be higher than at distant locations in the tube, and the pressure difference will cause flow in those directions.

At some distance from the photosynthetic source, there may be a region, say in a fruit, where sugar is needed. This theory suggests that the sucrose is transported into the fruit by active transport, raising the sugar concentration in the fruit relative to the sieve tube. In response to this concentration difference, water will follow the sugar into the fruit by osmosis.

http://hyperphysics.phy-astr.gsu.edu/hbase/Biology/plaene.html

買電子血壓計記

某天，板主帶母親大人到澤鉅旗下連鎖店買血壓機。
筆者對母親說不用請店員教授用法。
但是，阿媽仍然請了店員講解。
真正懂得使用血壓計的店員好像剛好不在店舖內。
一群女店員吩咐一位年輕男店員作講解。
他上好電池、駁好氣喉，便隨意將 cuff 包在上臂。
連媽媽都知道 cuff 箭咀要指著 antecubital region (opposite side of elbow).
他竟然說不用理會箭咀，是但求其包就可以。
母親大人問他心跳的正常範圍。
他說有個表，不過不知在哪。
此時我已經按捺不住，對他和阿媽說 60-100 bpm.
跟著他的同事問他能否應付。
他說︰「搞掂!」
本人看看他的名牌，兼職……助理……sigh...
先不理他的職位高低，他不應該死充。
其實他知道上壓、下壓、脈搏的顯示位置已經很好。
事後，母親大人竟然對我說只是想試試機。
另外，這個新血壓計有肱動脈 (brachial artery) 位置標示。
Cuff 包得對亦都有顯示。
P.S. 我以前做護士學生時聽聞醫院的血壓計是經調校的 (calibrate)，孰真孰假?

should be abstinent from craving

將自己的欲望建築在別人的痛苦之上

龍先生談保育

一個社會的進步，不能夠以犧牲少數人的幸福作為藉口，也盡量不以切斷過去的情感和歷史作為交換進步的代價。

禿筆練字