全文获取类型
收费全文 | 10608篇 |
免费 | 555篇 |
国内免费 | 261篇 |
专业分类
耳鼻咽喉 | 360篇 |
儿科学 | 465篇 |
妇产科学 | 262篇 |
基础医学 | 859篇 |
口腔科学 | 563篇 |
临床医学 | 1050篇 |
内科学 | 983篇 |
皮肤病学 | 182篇 |
神经病学 | 580篇 |
特种医学 | 719篇 |
外国民族医学 | 2篇 |
外科学 | 2383篇 |
综合类 | 1377篇 |
现状与发展 | 2篇 |
预防医学 | 237篇 |
眼科学 | 177篇 |
药学 | 415篇 |
5篇 | |
中国医学 | 97篇 |
肿瘤学 | 706篇 |
出版年
2024年 | 16篇 |
2023年 | 133篇 |
2022年 | 279篇 |
2021年 | 341篇 |
2020年 | 291篇 |
2019年 | 249篇 |
2018年 | 220篇 |
2017年 | 278篇 |
2016年 | 321篇 |
2015年 | 295篇 |
2014年 | 557篇 |
2013年 | 619篇 |
2012年 | 506篇 |
2011年 | 565篇 |
2010年 | 512篇 |
2009年 | 598篇 |
2008年 | 587篇 |
2007年 | 571篇 |
2006年 | 571篇 |
2005年 | 513篇 |
2004年 | 402篇 |
2003年 | 353篇 |
2002年 | 272篇 |
2001年 | 268篇 |
2000年 | 204篇 |
1999年 | 197篇 |
1998年 | 176篇 |
1997年 | 182篇 |
1996年 | 162篇 |
1995年 | 137篇 |
1994年 | 113篇 |
1993年 | 104篇 |
1992年 | 91篇 |
1991年 | 88篇 |
1990年 | 96篇 |
1989年 | 63篇 |
1988年 | 51篇 |
1987年 | 60篇 |
1986年 | 42篇 |
1985年 | 69篇 |
1984年 | 48篇 |
1983年 | 29篇 |
1982年 | 42篇 |
1981年 | 40篇 |
1980年 | 32篇 |
1979年 | 30篇 |
1978年 | 12篇 |
1977年 | 18篇 |
1976年 | 9篇 |
1973年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 21 毫秒
1.
《Vaccine》2022,40(30):4038-4045
PurposeAs protection from COVID-19 following two doses of the BNT162b2 vaccine showed a time dependent waning, a third (booster) dose was administrated. This study aims to compare the antibody response following the third dose versus the second and to evaluate post-booster seroconversion.MethodsA prospective observational study conducted in Maccabi Healthcare Services. Serial SARS-CoV-2 Spike IgG tests, 1,2,3 and 6 months following the second vaccine dose and one month following the third were obtained. Neutralizing antibody levels were measured in a subset of participants. Per individual SARS-CoV-2 Spike IgG titer ratios were calculated one month after the booster administration compared to titers one month following the second dose and prior to booster.ResultsAmong 110 participants, 56 (51%) were women. Mean age was 61.7 ± 1.9 years and 66 (60%) were immunocompromised. One month after third dose, IgG titers were induced 7.83 (95 %CI 5.25–11.67) folds and 2.40 (95 %CI 1.90–3.03) folds compared to one month after the second, in the immunocompromised and immunocompetent groups, respectively. Of the 17 immunocompromised participants who were seronegative after the second dose, 4 (24%) became seropositive following the third. Comparing the titers prior to the third dose, an increase of 50.7 (95 %CI 32.5–79.1) fold in the immunocompromised group and 25.7 (95 %CI 19.1–34.7) fold in and immunocompetent group, was observed.ConclusionA third BNT162b2 vaccine elicited robust humoral response, superior to the response observed following the second, among immunocompetent and immunocompromised individuals. 相似文献
2.
3.
Christopher Yeh Cem Atillasoy John T. Seykora Vivian Lee 《Journal of cutaneous pathology》2021,48(1):171-173
Respiratory cysts are benign lesions lined by normal respiratory epithelium. There are few reported cases localized to the orbit, while those of the eyelid are exceedingly rare. Respiratory cysts usually arise either from a non‐hereditary congenital malformation, where they are distinguished as choristomatous, or from trauma. Here, we report a case of a 53‐year‐old man who presented with a large right lower eyelid cyst that was histopathologically diagnosed as a respiratory cyst. 相似文献
4.
Gudrun Aspelund Elaa M Mahdi David H Rothstein Derek S Wakeman 《Journal of gastroenterology and hepatology》2019,34(6):966-974
Choledochal cysts (CDCs) and biliary atresia (BA) are rare pediatric hepatobiliary anomalies that require surgical intervention due to increased risk of malignancy and liver failure, respectively. The underlying disease and operative procedures place patients at risk for long‐term complications, which may continue to affect them into adulthood. Lack of a transitional care model in the health‐care system potentiates the challenges they will face following aging out of their pediatric providers' care. We sought to elucidate the long‐term complications and challenges patients with CDCs and BA face, review the current literature regarding transitioning care, and propose guidelines aiding adult providers in continued care and surveillance of these patients. A literature review was performed to assess short‐term and long‐term complications after surgery and the current standards for transitioning care in patients with a history of CDCs and BA. While transitional programs exist for patients with other gastrointestinal diseases, there are few that focus on CDCs or BA. Generally, authors encourage medical record transmission from pediatric to adult providers, ensuring accuracy of information and compliance with treatment plans. Patients with CDCs are at risk for developing biliary malignancies, cholangitis, and anastomotic strictures after resection. Patients with BA develop progressive liver failure, necessitating transplantation. There are no consensus guidelines regarding timing of follow up for these patients. Based on the best available evidence, we propose a schema for long‐term surveillance. 相似文献
5.
6.
Hidir Esme MD Huseyin Fidan MD Ahmet Cekirdekci MD 《Indian Journal of Thoracic and Cardiovascular Surgery》2006,22(2):137-140
Background Hydatid disease is the most severe helminthic zoonosis, with an important public health problem especially in rural areas
in Turkey. The aim of this study was to review the problems and advantages encountered in surgical treatment of 43 patients
who were ventilated with one-lung ventilation during last four years.
Methods Patients, operated with one-lung ventilation, constitute the study group. Data related to symptoms, radiographic findings,
performed surgical procedures, perioperative and postoperative morbidity, hospitalization time, and cyst recurrence were collected
from each individual's records.
Results Cystotomy and capitonnage were performed in all cases. Perioperative complications were seen in 5 patients. Four of these
5 patients had double-lumen endotracheal tube malpositioning. In one patient hypoxemia developed. The most common postoperative
complication was atelectasis. One patient had recurrent cysts. There was no perioperative or postoperative death.
Conclusions We prefer cystotomy and capitonnage because it is a fast and effective technique with limited postoperative complications.
One-lung ventilation prevents the exposure of lower lung areas from massive aspiration, which may cause acute obstruction
of airways, and contamination by cyst contents from the operative part of the lung that causes recurrent disease. One-lung
ventilation in pulmonary hydatid cyst surgery may be preferred owing to lower mortality and morbidity rates. 相似文献
7.
8.
9.
10.