全文获取类型
收费全文 | 182587篇 |
免费 | 1258篇 |
国内免费 | 60篇 |
专业分类
耳鼻咽喉 | 1203篇 |
儿科学 | 6793篇 |
妇产科学 | 3065篇 |
基础医学 | 17466篇 |
口腔科学 | 1729篇 |
临床医学 | 12836篇 |
内科学 | 32460篇 |
皮肤病学 | 771篇 |
神经病学 | 17109篇 |
特种医学 | 9248篇 |
外科学 | 29814篇 |
综合类 | 2338篇 |
预防医学 | 18288篇 |
眼科学 | 2846篇 |
药学 | 10334篇 |
中国医学 | 639篇 |
肿瘤学 | 16966篇 |
出版年
2023年 | 56篇 |
2022年 | 111篇 |
2021年 | 171篇 |
2020年 | 114篇 |
2019年 | 157篇 |
2018年 | 22030篇 |
2017年 | 17473篇 |
2016年 | 19609篇 |
2015年 | 1048篇 |
2014年 | 945篇 |
2013年 | 969篇 |
2012年 | 7298篇 |
2011年 | 21333篇 |
2010年 | 18978篇 |
2009年 | 11667篇 |
2008年 | 19879篇 |
2007年 | 22084篇 |
2006年 | 941篇 |
2005年 | 2575篇 |
2004年 | 3769篇 |
2003年 | 4706篇 |
2002年 | 2909篇 |
2001年 | 458篇 |
2000年 | 635篇 |
1999年 | 346篇 |
1998年 | 309篇 |
1997年 | 312篇 |
1996年 | 168篇 |
1995年 | 180篇 |
1994年 | 156篇 |
1993年 | 126篇 |
1992年 | 172篇 |
1991年 | 193篇 |
1990年 | 208篇 |
1989年 | 172篇 |
1988年 | 135篇 |
1987年 | 117篇 |
1986年 | 98篇 |
1985年 | 125篇 |
1984年 | 84篇 |
1983年 | 75篇 |
1982年 | 62篇 |
1980年 | 70篇 |
1979年 | 54篇 |
1974年 | 45篇 |
1970年 | 51篇 |
1969年 | 52篇 |
1938年 | 60篇 |
1932年 | 57篇 |
1930年 | 47篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
Chad G. Ball Andrew W. Kirkpatrick Matthew Smith Robert H. Mulloy Leonard Tse Ian B. Anderson 《European journal of trauma and emergency surgery》2007,33(5):550-552
Abstract We report a case of SMV injury in a critically ill patient. The patient was a 19-year-old woman involved in a motor vehicle
collision. Her injuries included grade II splenic and renal lacerations, devascularized and lacerated right and transverse
colon, a transected transverse mesocolon, a massive shear injury of her abdominal wall, and two partial SMV transections.
At initial damage control laparotomy, the SMV was ligated, the devascularized bowel resected and a temporary abdominal closure
applied. At re-operation, a mesocaval shunt using saphenous vein was employed. The shunt failed and the patient required a
saphenous vein jump graft. Although visceral vascular injuries are rare, ligation of the SMV in a damage control situation
is acceptable. This case study is the first to discuss appropriate treatment when interruption to a patient's collateral visceral
venous drainage limits the surgeon’s ability to ligate. In these situations, bypass shunts may be successful. 相似文献
32.
Henry Cisneros 《AIDS and behavior》2007,11(2):7-8
For persons battling HIV/AIDS a stable place to live may decide the length and quality of life itself. It is nearly impossible for a person on the streets to engage in a needed continuous AIDS treatment regimen when the very basic question of where that person will rest his or her head when darkness comes in just a few hours is unresolved. When danger lurks on the streets, when cold numbs the limbs, when tiredness overwhelms the mind, when fear breaks the spirit, a place to call home would make all the difference. 相似文献
33.
34.
Nishida Koyo Mihara Kiyoshi Takino Toichi Nakane Sachi Takakura Yoshinobu Hashida Mitsuru Sezaki Hitoshi 《Pharmaceutical research》1991,8(4):437-444
The effect of electric charge on the hepatic disposition of macromolecules was studied in the rat. Charged derivatives of dextran (T-70) and bovine serum albumin (BSA), mitomycin C–dextran conjugates (MMC-D), and lactosaminated BSA (Lac-BSA) were employed as model macromolecules. After intravenous injection, cationic macromolecules were rapidly eliminated from plasma because of their extensive hepatic uptake, while anionic and neutral macromolecules were slowly eliminated. Cationic macromolecules were recovered from parenchymal and nonparenchymal hepatic cells at a cellular uptake (per unit cell number) ratio of 1.4–3.2, while that of Lac-BSA was 14. During liver perfusion using a single-pass constant infusion mode, cationic macromolecules were continuously extracted by the liver, with extraction ratios at steady-state (E
ss) ranging between 0.03 and 0.54, whereas anionic and neutral macromolecules were almost completely recovered in the outflow at steady state. The E
ss for cationized BSA (Cat-BSA) and cationic MMC-Dcat were concentration dependent and decreased at low temperatures and in the presence of colchicine and cytochalasin B. The possible participation of the internalization process in the uptake of cationic macromolecules by hepatocytes was suggested. 相似文献
35.
Background
Reports on childhood cancer survivors estimated cumulative probability of developing secondary neoplasms vary from 3,3% to 25% at 25 years from diagnosis, and the risk of developing another cancer to several times greater than in the general population. 相似文献36.
37.
Background
The fibromyalgia syndrome (FMS) is suggested to be a manifestation of depression or affective spectrum disorder. We measured the cognitive style of patients with FMS to assess personality styles in 44 patients with fibromyalgia syndrome (FMS) by comparing them with 43 patients with major depressive disorder (MDD) and 41 healthy controls (HC). 相似文献38.
39.
40.
Introduction Choroid plexus cysts can lead to isolation of the lateral ventricles and distension of the third ventricle. We present an
ultrasonographic video documentation of an infant with variably shaped and localized choroid plexus cyst of the third ventricle.
Case report An infant had periods of increased intracranial pressure with changing dilatation of the first to third ventricle. Cerebral
ultrasonography of the not crying boy demonstrated a choroid plexus cyst limply hanging down from the roof of the third ventricle
to the beginning of the aqueduct of Sylvius. During crying, the cyst prolapsed from the third into left lateral ventricle
and was strangled by the foramen of Monro. Endoscopic cyst fenestration and third ventriculostomy continuously solved the
problem of intermittent hydrocephalus occlusus.
Conclusion Depending not only on localization and size but also on cyst form and cerebrospinal fluid pressure, a single choroid plexus
cyst can cause various obstructions of cerebrospinal fluid pathways. 相似文献